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Chromism

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2368: 2378: 1742: 54:, especially the π- or d-electron state, so this phenomenon is induced by various external stimuli which can alter the electron density of substances. It is known that there are many natural compounds that have chromism, and many artificial compounds with specific chromism have been synthesized to date. It is usually synonymous with 783:
dyes was 800,000 tonnes and of organic pigments, 250,000 tonnes and the volume has grown at a steady rate throughout the early years of this century. In 2019 the value of the organic dyes/pigments market is forecast to be $ 19.5bn. Their value is exceeded by the very large production of
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Those phenomena which involve the change in color of a chemical compound under an external stimulus fall under the generic term of chromisms. They take their individual names from the type of the external influence, which can be either
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Materials may be used to control and manipulate light via a variety of mechanisms to produce useful effects involving color. For instance, a change of orientation of molecules to produce a visual effect as in
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produce color by the absorption and reflection of light; these are the materials that make a major impact on the color of our daily lives. In 2000, world production of
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Bamfield Peter and Hutchings Michael, Chromic Phenomena; technological applications of colour chemistry, 3rd Edition, Royal Society of Chemistry, Cambridge, 2018.
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Absorption of light and energy transfer (or conversion) involves colored molecules that can transfer electromagnetic energy, commonly in the form of a
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Color change materials have been used in several very common outlets but also in an increasing number of new ones. Commercial applications include
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Vik Michal and Periyasamy Aravin Prince, Chromic Materials; Fundamentals, Measurements and Applications, Apple Academic Press, 2018.
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Ferrara Mariella and Murat Bengisu, Materials that Change Color: Smart Materials and Intelligent Design, Springer, 2014.
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Chromism is classified by what kind of stimuli are used. Examples of the major kinds of chromism are as follows.
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is chromism that is induced by heat, that is, a change of temperature. This is the most common chromism of all.
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by chromic materials/chromophores is exploited in solar cells for the production of electrical energy via
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The output from the chromisms described above is observed by a change in the absorption spectra of the
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of its ambient surrounding medium, such as temperature and pressure, light, solvent, and presence of
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Amimoto, K.; Toshio, K. (2005). "Photochromism of organic compounds in the crystal state".
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The absorption of energy followed by the emission of light is often described by the term
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in a variety of ways. These can be categorized under the following five headings:
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Dyes are also made using the properties of chromic substances: Examples being
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There are also chromisms which involve two or more stimuli. Examples include:
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in crystals, precipitation of metal particles in a glass, or other mechanisms.
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Inorganic Chromotropism: Basic Concepts and Applications of Colored Materials
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between two different molecular structures, light-induced formation of
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Journal of Photochemistry and Photobiology C: Photochemistry Reviews
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light source, to other molecules in another form of energy, such as
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is induced by light irradiation. This phenomenon is based on the
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is a process that induces a change, often reversible, in the
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There are many more chromisms and these are listed below in
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The absorption of light and energy transfer (or conversion)
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Color change of a chemical substance due to its environment
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Color changes are also observed on the interaction of
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are those phenomena in which color is produced when
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of microbes, blood and insects. The absorption of
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Most solvatochromic compounds are 1286:10.1016/j.jphotochemrev.2005.12.002 106:is induced by the gain and loss of 2000:Blue–green distinction in language 1011:medicinal analysis and diagnostics 25: 2376: 2367: 2366: 2157:International Colour Association 1740: 1243:"Chromotropism and phototropism" 1093:in the treatment of cancer, in 2152:International Color Consortium 2141:International Colour Authority 1069:of chemical reactions and the 346:chemical polarity/polarisation 1: 2217:List of Crayola crayon colors 1172:bioinspired structural colors 965:and other important outlets. 342:vapour of an organic compound 152:§ Color change phenomena 1241:Minkiewicz, Romauld (1907). 1203:Fukuda, Yutaka, ed. (2007). 118:active sites, such as metal 110:. This phenomenon occurs in 2020:Traditional colors of Japan 1797:Achromatic colors (Neutral) 1680:Multi-primary color display 1454:Spectral power distribution 1160:optically variable pigments 1055:laser addressable colorants 1025:in the burgeoning areas of 2424: 1123:dye sensitized solar cells 224:The manipulation of light. 2362: 1880:Color realism (art style) 1738: 1538:Evolution of color vision 1127:artificial photosynthesis 1041:Light and energy transfer 621:plasmonic solvatochromism 2197:List of colors (compact) 2015:Color in Chinese culture 1665:Digital image processing 1398:Electromagnetic spectrum 1247:J. Comp. Neurol. Psychol 898:Electrochemiluminescence 629:plasmonic chronochromism 541:dimerisation/aggregation 2202:List of colors by shade 1144:liquid crystal displays 1117:and organic materials ( 1115:inorganic photovoltaics 1059:near-infrared absorbers 713:direct thermal printing 639:Commercial applications 2207:List of color palettes 1061:, are used in thermal 1035:metallic nanoparticles 633:plasmonic vapochromism 625:plasmonic ionochromism 613:metallic nanoparticles 605:Electromechanochromism 285:gas - hydrogen/oxygen 229:Color change phenomena 2131:Color Marketing Group 1886:On Vision and Colours 1819:Tinctures in heraldry 1430:Structural coloration 1259:10.1002/cne.920170104 1119:organic photovoltaics 1053:or electrical. These 1027:light-emitting diodes 983:plasma display panels 949:Crystalloluminescence 597:Thermosolvatochromism 175:mechanofluorochromism 171:electrofluorochromism 167:solvatofluorochromism 2212:List of color spaces 2104:Tint, shade and tone 1987:Cultural differences 1802:Polychromatic colors 1787:Complementary colors 1775:Monochromatic colors 1091:photothermal therapy 1087:photodynamic therapy 1081:, as sensitisers in 1075:optical data storage 1071:selective absorption 979:fluorescent lighting 955:Elasticoluminescence 593:Solvatophotochromism 581:Photoelectrochromism 2192:List of colors: N–Z 2187:List of colors: G–M 2182:List of colors: A–F 1023:electroluminescence 999:optical brighteners 967:Cathodoluminescence 946:Mechanoluminescence 924:Cathodoluminescence 914:Candololuminescence 860:Galvanoluminescence 857:electroluminescence 615:and their attached 601:Halosolvatochromism 486:crystalline habitat 471:interfacing with a 309:Concentratochromism 60:chemical properties 2239:List of web colors 2234:List of RAL colors 1640:Color reproduction 1605:Lüscher color test 1442:Color of chemicals 1137:Light manipulation 1131:molecular machines 1067:photosensitisation 943:Fractoluminescence 908:Thermoluminescence 833:Thermochromic dyes 697:indicators/sensors 589:Bioelectrochromism 585:Photovoltachromism 567:when a species is 448:ionising radiation 395:mechanical actions 2390: 2389: 2330: 2329: 2112: 2111: 1904: 1903: 1894:Theory of Colours 1736: 1735: 1648:Color photography 1600:Color preferences 1543:Impossible colors 1533:Color vision test 1528:Color temperature 1506:Color calibration 1435:Animal coloration 1338:978-3-319-00289-7 1316:978-1-78801-503-5 1308:978-1-78262-815-6 1164:photonic crystals 1103:photoinactivation 1099:phototheranostics 1063:energy conversion 1015:chemoluminescence 975:photoluminescence 971:cathode ray tubes 963:consumer products 940:Triboluminescence 930:Radioluminescence 927:Anodoluminescence 892:Chemiluminescence 873:Photoluminescence 829:Photochromic dyes 767:Dyes and pigments 745:biological probes 574: 573: 557:of a chromophore 555:crystal structure 549:Crystallochromism 510:interaction with 473:biological entity 194:chromic materials 186:Chromic phenomena 181:Chromic phenomena 165:, exemplified by 16:(Redirected from 2415: 2380: 2379: 2370: 2369: 2170: 2036:Color dimensions 2025:Human skin color 1915: 1792:Analogous colors 1758: 1744: 1670:Color management 1587:Color psychology 1553:Opponent process 1469:Color perception 1388: 1367: 1360: 1353: 1344: 1290: 1289: 1269: 1263: 1262: 1238: 1232: 1231: 1229: 1228: 1219:. Archived from 1200: 1184:optical limiters 1180:opto-electronics 1107:natural sunlight 911:Pyroluminescence 863:Sonoluminescence 822:digital printing 737:solar protection 733:flexible devices 673:optical switches 569:surface adsorbed 543:of chromophores 313:changes in the 274:electric current 245: 159:chromic material 21: 2423: 2422: 2418: 2417: 2416: 2414: 2413: 2412: 2393: 2392: 2391: 2386: 2358: 2326: 2243: 2161: 2118: 2108: 2031: 2010:Blue in culture 1981: 1900: 1847:Secondary color 1823: 1780:black-and-white 1752: 1745: 1732: 1634: 1620:National colors 1615:Political color 1595:Color symbolism 1581: 1511:Color constancy 1489:Color blindness 1463: 1420:Spectral colors 1377: 1371: 1299: 1294: 1293: 1271: 1270: 1266: 1240: 1239: 1235: 1226: 1224: 1217: 1202: 1201: 1197: 1192: 1156:lustre pigments 1139: 1079:photoconductors 1043: 1019:bioluminescence 1003:safety clothing 987:phosphorescence 952:Lyoluminescence 895:Bioluminescence 882:Biofluorescence 879:Phosphorescence 869:Photons (light) 840: 769: 741:solvatochromics 721:electrochromics 717:textile sensors 641: 563:Sorptiochromism 536:Aggregachromism 480:Amorphochromism 455:Magnetochromism 430:Cathodochromism 390:Mechanochromism 378:Metallochromism 327:changes in the 294:Solvatochromism 269:Electrochromism 231: 183: 163:fluorochromisms 144:metal complexes 134:depends on the 131:solvatochromism 103:electrochromism 28: 23: 22: 15: 12: 11: 5: 2421: 2419: 2411: 2410: 2408:Photochemistry 2405: 2395: 2394: 2388: 2387: 2385: 2384: 2374: 2363: 2360: 2359: 2357: 2356: 2351: 2346: 2340: 2338: 2332: 2331: 2328: 2327: 2325: 2324: 2319: 2314: 2309: 2304: 2299: 2294: 2289: 2284: 2279: 2274: 2269: 2264: 2259: 2253: 2251: 2245: 2244: 2242: 2241: 2236: 2231: 2226: 2225: 2224: 2214: 2209: 2204: 2199: 2194: 2189: 2184: 2178: 2176: 2167: 2163: 2162: 2160: 2159: 2154: 2149: 2143: 2138: 2133: 2128: 2122: 2120: 2114: 2113: 2110: 2109: 2107: 2106: 2101: 2096: 2095: 2094: 2089: 2084: 2079: 2074: 2064: 2063: 2062: 2052: 2051: 2050: 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1132: 1128: 1124: 1120: 1116: 1113:, using both 1112: 1108: 1104: 1101:, and in the 1100: 1096: 1092: 1088: 1084: 1083:photomedicine 1080: 1077:, as organic 1076: 1072: 1068: 1064: 1060: 1056: 1052: 1048: 1040: 1038: 1036: 1032: 1028: 1024: 1020: 1016: 1012: 1008: 1004: 1000: 996: 992: 988: 984: 980: 976: 972: 968: 964: 956: 953: 950: 947: 944: 941: 937: 934: 931: 928: 925: 921: 920:Electron Beam 918: 915: 912: 909: 905: 902: 899: 896: 893: 889: 886: 883: 880: 877: 874: 870: 867: 864: 861: 858: 854: 851: 850: 849: 847: 846: 837: 835: 834: 830: 825: 823: 819: 815: 811: 807: 803: 799: 795: 791: 787: 782: 778: 774: 766: 764: 762: 758: 754: 750: 746: 742: 738: 734: 730: 729:smart windows 726: 722: 718: 714: 710: 706: 702: 698: 694: 690: 686: 682: 678: 674: 670: 666: 662: 658: 654: 650: 646: 645:photochromics 638: 636: 634: 630: 626: 622: 618: 614: 606: 602: 598: 594: 590: 586: 582: 579: 578: 577: 570: 566: 564: 561: 560: 556: 552: 550: 547: 546: 542: 539: 537: 534: 533: 530: 526: 524: 521: 520: 517: 513: 509: 507: 506:Hydrochromism 504: 503: 500: 496: 494: 491: 490: 487: 483: 481: 478: 477: 474: 470: 468: 465: 464: 461: 458: 456: 453: 452: 449: 446: 444: 443:Radiochromism 441: 440: 436: 435:electron beam 433: 431: 428: 427: 424: 420: 418: 417:Piezochromism 415: 414: 411: 408: 405: 403: 402:Tribochromism 400: 399: 396: 393: 391: 388: 387: 384: 381: 379: 376: 375: 372: 368: 366: 363: 362: 359: 356: 354: 351: 350: 347: 343: 340: 338: 335: 334: 330: 326: 324: 321: 320: 316: 315:concentration 312: 310: 307: 306: 303: 300: 297: 295: 292: 291: 288: 284: 282: 279: 278: 275: 272: 270: 267: 266: 263: 260: 258: 255: 254: 250: 247: 246: 243: 241: 237: 228: 223: 220: 217: 213: 210: 206: 202: 199: 198: 197: 195: 191: 187: 180: 178: 176: 172: 168: 164: 160: 155: 153: 145: 141: 137: 133: 132: 128: 125: 121: 117: 113: 109: 105: 104: 100: 97: 96:color centers 93: 92:isomerization 89: 88: 87:photochromism 84: 81: 80: 76: 75: 74: 71: 69: 65: 61: 57: 56:chromotropism 53: 49: 45: 41: 37: 33: 19: 18:Chromotropism 2092:Fluorescence 2055:Colorfulness 2048:Dichromatism 1892: 1884: 1854:Chromaticity 1837:Color mixing 1829:Color theory 1762:Color scheme 1625:Chromophobia 1574: 1297:Bibliography 1277: 1273: 1267: 1253:(1): 89–92. 1250: 1246: 1236: 1225:. 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Springer. 1205: 1198: 1162:, colloidal 1148:interference 1140: 1044: 1031:quantum dots 991:fluorescence 960: 876:Fluorescence 845:luminescence 843: 841: 838:Luminescence 826: 770: 753:gasochromics 705:ionochromics 701:architecture 642: 610: 575: 497:lowering of 493:Cryochromism 437:irradiation 365:Halochromism 353:Ionochromism 337:Vapochromism 281:Gasochromism 232: 185: 184: 156: 149: 129: 101: 85: 77: 72: 55: 35: 29: 2229:Color chart 2087:Iridescence 1919:Basic terms 1910:Color terms 1864:Color wheel 1859:Color solid 1723:Color space 1709:subtractive 1692:Color model 1563:Unique hues 1459:Colorimetry 1425:Chromophore 1152:diffraction 1111:solar cells 969:is used in 761:gas sensors 725:car mirrors 649:ophthalmics 553:changes in 499:temperature 484:changes in 467:Biochromism 421:mechanical 262:temperature 122:or organic 2397:Categories 2249:Shades of: 2082:Brightness 1814:Web colors 1770:Color tool 1753:philosophy 1658:Color cast 1558:Afterimage 1548:Metamerism 1521:Color code 1516:Color task 1499:Dichromacy 1227:2022-10-25 1190:References 1168:holography 1085:, such as 1007:biological 936:Mechanical 853:Electrical 771:Classical 709:copy paper 512:bulk water 407:mechanical 383:metal ions 369:change in 209:reflection 205:absorption 50:states of 2099:Grayscale 2072:Lightness 2067:Luminance 1876:(fashion) 1576:The dress 818:cosmetics 786:inorganic 657:cosmetics 112:compounds 108:electrons 68:electrons 52:molecules 44:compounds 32:chemistry 2403:Chromism 2372:Category 2354:Lighting 2077:Darkness 1897:(Goethe) 1697:additive 1685:Quattron 997:, inks, 995:pigments 888:Chemical 777:pigments 693:textiles 689:plastics 661:security 516:humidity 423:pressure 410:friction 329:rigidity 302:polarity 240:physical 236:chemical 218:of light 216:emission 211:of light 136:polarity 124:radicals 48:electron 36:chromism 2336:Related 2297:Magenta 2222:history 2126:Pantone 1413:Visible 1408:Rainbow 1166:and in 1051:thermal 904:Thermal 814:plastic 802:leather 781:organic 757:windows 749:sensors 699:and in 665:sensors 653:fashion 617:ligands 344:due to 299:solvent 140:solvent 138:of the 2349:Qualia 2344:Vision 2292:Purple 2287:Violet 2267:Yellow 2262:Orange 1957:Orange 1952:Purple 1942:Yellow 1376:topics 1336:  1325:  1314:  1310:{EPUB 1306:  1213:  1154:as in 1121:) and 1005:, and 810:paints 681:paints 251:Cause 40:colors 2382:Index 2322:Black 2312:White 2307:Brown 2272:Green 2174:Lists 2166:Names 2148:(CIE) 2117:Color 1977:Brown 1972:White 1962:Black 1932:Green 1751:Color 1447:Water 1403:Light 1374:Color 1047:laser 794:paper 287:redox 248:Type 190:light 116:redox 114:with 2317:Gray 2302:Pink 2282:Blue 2277:Cyan 1967:Gray 1947:Pink 1927:Blue 1714:CMYK 1334:ISBN 1323:ISBN 1312:ISBN 1304:ISBN 1211:ISBN 1158:and 1150:and 1097:and 1089:and 1033:and 1017:and 1009:and 981:and 831:and 816:and 806:inks 798:hair 775:and 773:dyes 759:and 747:and 735:and 715:and 691:and 685:inks 671:and 631:and 529:time 358:ions 207:and 203:The 173:and 120:ions 66:and 64:ions 2257:Red 2043:Hue 1937:Red 1702:RGB 1282:doi 1255:doi 993:in 977:in 755:in 743:in 739:, 723:in 707:in 695:as 679:in 647:in 514:or 238:or 42:of 30:In 2399:: 1318:}. 1276:. 1251:17 1249:. 1245:. 1186:. 1133:. 1065:, 1037:. 1013:, 1001:, 985:, 973:, 938:– 922:– 906:– 890:– 871:– 855:– 812:, 808:, 800:, 796:, 792:, 763:. 751:, 731:, 727:, 719:, 711:, 703:, 687:, 683:, 675:, 667:, 663:, 659:, 651:, 635:. 627:, 623:, 603:– 599:– 595:– 591:– 587:– 583:– 371:pH 177:. 169:, 154:. 70:. 34:, 1366:e 1359:t 1352:v 1329:. 1288:. 1284:: 1278:6 1261:. 1257:: 1230:. 957:. 932:. 916:. 900:. 884:. 865:. 655:/ 607:. 146:. 126:. 20:)

Index

Chromotropism
chemistry
colors
compounds
electron
molecules
chemical properties
ions
electrons
thermochromism
photochromism
isomerization
color centers
electrochromism
electrons
compounds
redox
ions
radicals
solvatochromism
polarity
solvent
metal complexes
§ Color change phenomena
chromic material
fluorochromisms
solvatofluorochromism
electrofluorochromism
mechanofluorochromism
light

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