Crystallochromy

WebMay 17, 2010 · The isopropyl derivative exhibited the highest fluorescence quantum yield in the solid state of 0.90 in the series of alkylated tetracenes. X-ray analysis revealed that there were significant structural differences in alkyl conformation and crystal packing. The crystallochromy effects are derived from the unique crystal-packing patterns. 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.

Cromology Cromology

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 … 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 … greenery rate https://scarlettplus.com

Synthesis and Crystallochromy of …

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 … 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 ... WebAug 30, 2013 · The crystallochromy of the red and yellow solids of tetracenes was theoretically investigated using the transition-density-fragment interaction combined with … greenery recipe cards

Octaalkyl tetracene-1,2,3,4,7,8,9,10-octacarboxylates: synthesis by ...

Category:Crystallochromy of perylene pigments: Influence of an enlarged ...

Tags:Crystallochromy

Crystallochromy

ChemInform Abstract: Octaalkyl Tetracene‐1,2,3,4,7,8,9,10 ...

WebCrystallochromy of perylene pigments: Interference between Frenkel excitons and charge-transfer states Gisslén, Linus ; Scholz, Reinhard The optical properties of … WebDec 13, 2016 · Chromoly steel is a type of low alloy steel that gets its name from a combination of the words “chromium” and “molybdenum” – two of the major alloying …

Crystallochromy

Did you know?

WebMay 1, 2002 · A Theoretical Study of Crystallochromy. Quantum Interference Effects in the Spectra of Perylene Pigments WebCrystallochromy of perylene pigments: Influence of an ... - Idsia. EN. English Deutsch Français Español Português Italiano Român Nederlands Latina Dansk Svenska Norsk …

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 ... 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 …

WebAug 30, 2013 · The crystallochromy of the red and yellow solids of tetracenes was theoretically investigated using the transition-density-fragment interaction combined with …

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, …

WebAs demonstrated in a recent model study of several perylene pigments crystallizing in the monoclinic space group P 21/c, the optical properties in the crystalline phase are … greenery recycleWebJul 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. fluid and electrolyte imbalance icd 10WebJun 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 … fluid and electrolytes edapt quizletWebAlkyl-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: fluid and electrolyte quizzesWebWhen 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 … fluid and electrolyte imbalance quizWebActa Crystallographica B is the forum for the publication of such contributions. Scientific developments based on experimental studies as well as those based on theoretical … fluid and electrolyte guidelinesWebOctaalkyl tetracene-1,2,3,4,7,8,9,10-octacarboxylates: synthesis by twofold [2+2+2] cocyclization and crystallochromy - Chemical Communications (RSC Publishing) Maintenance work is planned for Wednesday 5th April 2024 from 09:00 to 10:30 (BST). greenery rectangle