Crystallochromy
WebJun 21, 2011 · Tetracene octaesters, which were prepared by twofold [2+2+2] cocyclization, were isolated as red, orange, and orange-yellow solids for the methyl, ethyl, and propyl ester derivatives, respectively. X-Ray crystallographic analysis reveals that the difference in solid-state color arises owing to diffe … WebJul 1, 2003 · Many organic colorants show crystallochromy, i.e. the dependence of color on crystal packing. [ 46] This dependence has various reasons. Firstly, the molecules in the crystals may exist as different tautomers or may adopt different conformations.
Crystallochromy
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WebJan 17, 2012 · Whilst searching the literature, we stumbled upon the term “crystallochromy”, which was defined as the dependence of solid‐state color on crystal packing. WebOct 1, 1994 · A Theoretical Study of Crystallochromy. Quantum Interference Effects in the Spectra of Perylene Pigments Journal of the American Chemical Society …
WebCrystallochromy of perylene pigments: Interference between Frenkel excitons and charge-transfer states Linus Gisslén* and Reinhard Scholz† Physik Department und Walter Schottky Institut, Technische Universität München, Am Coulombwall 3, … WebWhen we searched the literature, we stumbled upon a nice term “crystallochromy,” which defined as the dependence of solid-state color on molecular packing. This term was first brought by a BASF group [ 7 ], who studied a series …
WebMay 1, 2002 · A Theoretical Study of Crystallochromy. Quantum Interference Effects in the Spectra of Perylene Pigments WebSep 10, 2009 · Based on the crystal structure determined by x-ray diffraction, density-functional theory (DFT) and Hartree-Fock are used for the calculation of the electronic …
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WebCrystallochromy of perylene pigments: Influence of an ... - Idsia. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk Magyar Bahasa Indonesia Türkçe Suomi Latvian Lithuanian česk ... fll ncsuWebMar 1, 2024 · Cromology’s Brands. Cromology brings together almost thirty brands, about twenty of which benefit of a strong awareness in their respective countries. All Brands. … great halloween snacks for kidsWebTetracene octaesters, which were prepared by twofold [2+2+2] cocyclization, were isolated as red, orange, and orange-yellow solids for the methyl, ethyl, and propyl ester … great hall partners investmentsWebThe meaning of LITHOCHROMY is the art of painting on stone. Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one … great hall parking tunbridge wellsWebJan 18, 2010 · We synthesized a series of 1,4,7,10-tetraalkyltetracenes using a new 2,6-naphthodiyne precursor and 2,5-dialkylfurans as starting materials (alkyl=methyl to hexyl). Surprisingly, the solid-state... great hall oxygen not includedWebOct 10, 2009 · Quantum chemical ab initio calculations are performed at MP2 and B3LYP levels of theory and 6-311 ++G** basis set in order to determine the changes in the geometrical parameters and IR-spectroscopic characteristics as a result of Npy protonation. The observed crystallochromy effect is discussed as well. great hall oxfordWebMay 17, 2010 · The photophysical properties exhibit crystallochromy ranging from yellow to red and different fluorescence quantum yields depending on the length of the alkyl side chain. The isopropyl derivative achieved the highest quantum yield ever reported among tetracenes. Details are discussed in the article by C. Kitamura et al. on p. 3033 ff. great hall pages