Crystallochromy
WebAbstract 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 … 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 …
Crystallochromy
Did you know?
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 … 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 …
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. 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.
WebAbstract 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... 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 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 ...
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, … csst vs copper for natural gasWebApr 18, 2011 · As demonstrated in a recent model study of several perylene pigments crystallizing in the monoclinic space group P 21/c, the optical properties in the … early bird menu harvester restaurantsWebAlkyl-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: early bird llcWebThe 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 … css twigWebAug 30, 2013 · The crystallochromy of the red and yellow solids of tetracenes was theoretically investigated using the transition-density-fragment interaction combined with … early bird lake cowichanWebJan 4, 2011 · ChemInform Abstract: Octaalkyl Tetracene‐1,2,3,4,7,8,9,10‐octacarboxylates: Synthesis by Twofold [2 + 2 + 2] Cocyclization and Crystallochromy. early bird menu dublin 2WebAug 30, 2013 · The crystallochromy of the red and yellow solids of tetracenes was theoretically investigated using the transition-density-fragment interaction combined with … early bird mgg express