Crystallochromy
WebMay 1, 2000 · Solution spectra of perylenetetracarboxylic dianhydride (PTCDA) show an equilibrium between monomers and dimers, with fluorescence exclusively from monomers and absorption from both. The dimer absorption follows closely the spectrum of PTCDA stacks in crystalline films, which indicate strong coupling to a molecular vibration and … WebMay 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.
Crystallochromy
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WebAlkyl-Engineered Dual-State Luminogens with Pronounced Odd–Even Effects: Quantum Yields with up to 48% Difference and Crystallochromy with up to 22 nm Difference Author: Yuanye Yin, Aixiang Ding, Felicia He, Chengyuan Wang, Lin Kong, Jiaxiang Yang Source: Journal of physical chemistry 2024 v.126 no.15pp. 2921-2929 ISSN: 1520-5207 Subject: WebActa Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical …
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.
WebThe 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 … WebSep 1, 2009 · Crystallochromy of perylene pigments: Interference between Frenkel excitons and charge-transfer states Authors: Linus Gisslén R. Scholz Technische …
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 …
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 … popcorn sutton dead photoWebJan 14, 2010 · The effects of molecular structure, crystal packing, and exciton coupling on the color were investigated. Abstract We synthesized a series of 1,4,7,10 … popcorn sutton ford fairmontWebCrystallochromy 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 ... popcorn sutton bottleWebcrystallochromy effects are derived from the unique crystal-packing patterns. The fluorescence quantum yields in the so-lid state probably depend on the relative positional relation-ship of the nearest neighboring molecules in one column as well as the crystal rigidity. among acenes. Furthermore, the fluorescence quantum popcorn sutton jack daniels bottleWebCrystallochromy 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, … sharepoint online site read only modeWebSep 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 … popcorn sutton jam 2022 scheduleWebAug 30, 2013 · The crystallochromy of the red and yellow solids of tetracenes was theoretically investigated using the transition-density-fragment interaction combined with … sharepoint online site restore