Crystallochromy
WebApr 6, 2024 · Perylene bisimide dyes are high-performance pigments that have red, maroon or black colors, but with typically only weak fluorescence in the solid state. Here, the authors report a series of π ... WebAs demonstrated in a recent model study of several perylene pigments crystallizing in the monoclinic space group P2 1 /c, the optical properties in the crystalline phase are determined by the interference between neutral molecular excitations and charge transfer states via electron and hole transfer.
Crystallochromy
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WebSep 28, 2024 · Spectroscopy Crystalline solids ABSTRACT Electron–phonon coupling plays a central role in the transport properties and photophysics of organic crystals. Successful models describing charge- and energy-transport in … 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 …
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.
WebApr 8, 2024 · The odd–even effect in FLQY is over 26% alternation, and a maximum of 48% difference in FLQY was observed between the compounds C1 and C2 with a methyl and … 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:
WebJul 4, 2024 · We demonstrate crystallochromy in that small changes in the packing structure give rise to dramatically different absorption spectra. Through a remarkable comparison between squaraines in poly ...
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 … granny square christmas stocking patternWebJan 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... chin siew huiWebActa Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical … granny square christmas stockings patternsWebSynthetically, they are derived from perylene-1,4,5,8-tetracarboxylic acid. The perylenes tend to be quite expensive pigments, but their high levels of fastness properties mean that they are suitable for highly demanding applications. In particular, they offer very high heat stability. Two perinone pigments are used commercially. granny square christmas stockingsWebJul 13, 2012 · Tuning the Solid‐State Optical Properties of Tetracene Derivatives by Modification of the Alkyl Side‐Chains: Crystallochromy and the Highest Fluorescence Quantum Yield in Acenes Larger than Anthracene. Chitoshi Kitamura. E-mail address: [email protected]‐hyogo.ac.jp. chin-shu wooden ltd filing cabinetWebTetracene 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 … chin shu wooden ltd craft furnitureWebJan 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 … granny square clothes pic