نتایج جستجو برای: Bathochromic

تعداد نتایج: 287  

Journal: :Journal of the American Chemical Society 2012

Journal: :Physical chemistry chemical physics : PCCP 2011
Heinz Langhals Andreas Walter Erik Rosenbaum Lennart B-Å Johansson

A perylene and a terrylene tetracarboxylic bisimide dyad was prepared in which an efficient energy transfer from the former to the latter is observed. The absorption spectrum of this compound covers a broad range. Bathochromic fluorescence with a high quantum yield was obtained independent of excitation wavelengths (λ < 655 nm). The dyad can be recommended for the use of calibrating fluorescenc...

2005
Chad A. LANDIS Sean R. PARKIN John E. ANTHONY

We have prepared a series of trialkylsilylethynylated anthracenes (a–d) to investigate the effects of solid-state interactions and acene substitution on the electroluminescence spectra of OLED devices. We designed these materials to have differing amounts of -face interactions and various film morphologies. We were particularly interested in intermolecular interactions between aromatic faces, w...

Journal: :Molecules 2017
Filippo Stella Christoph Marschner Judith Baumgartner

Molecules containing catenated heavy group 14 atoms are known to exhibit the interesting property of σ-bond electron delocalization. While this is well studied for oligo- and polysilanes the current paper addresses the UV-absorption properties of small tin containing oligosilanes in order to evaluate the effects of Sn-Si and Sn-Sn bonds as well as the results of substituent exchange from methyl...

Journal: :Acta crystallographica. Section D, Biological crystallography 2012
Sergei Pletnev Nadya V Pletneva Ekaterina A Souslova Dmitry M Chudakov Sergey Lukyanov Alexander Wlodawer Zbigniew Dauter Vladimir Pletnev

The crystal structures of the far-red fluorescent proteins (FPs) eqFP650 (λ(ex)(max)/λ(em)(max) 592/650 nm) and eqFP670 (λ(ex)(max)/λ(em)(max) 605/670 nm), the successors of the far-red FP Katushka (λ(ex)(max)/λ(em)(max) 588/635 nm), have been determined at 1.8 and 1.6 Å resolution, respectively. An examination of the structures demonstrated that there are two groups of changes responsible for ...

Journal: :Chemical communications 2005
Sibylle Müller Klaus Müllen

The straightforward synthesis of two new classes of core-extended perylene chromophores, dibenzocoronene tetracarboxdiimide and indenoperylene dicarboxmonoimide, proves that directional enlargement of the aromatic pi-system leads to tailored bathochromic and hypsochromic shifts.

2010
R. RIDDELL G. E. UHLENBECK

and biphenyl to 1700A,8 it is assumed that the introduction of a methylene bridge (fluorene is 2,2'-methylene-biphenyl) results in an approximately planar structure in which the phenyl groups are not symmetrical about an axis through the 4,4'-positions. This is in agreement with dipole moment measurements which favor this configuration.9 The band positions change due to alkyl substitution (bath...

2017
Suru V John Christian C De Filippo Simone Silvestrini Michele Maggini Emmanuel Iwuoha

Through a cycloaddition reaction, fullerene (C60) was derivatized with a novel organic compound 5-(benzo[b]thiophen-3-yl)pyridine-3-carbaldehyde to form the processable and stable 3-(benzo[b]thiophene-3yl)-5-fullero-1-methylpyrrolidinepyridine (BTFP) compound. BTFP exhibits close similarities to phenyl-C61-butyric-acid-methyl-ester (PCBM) in terms of first reduction potential values (-0.62 and ...

Journal: :Chemistry 2015
Nidal Saleh Barry Moore Monika Srebro Nicolas Vanthuyne Loïc Toupet J A Gareth Williams Christian Roussel Kirandeep K Deol Gilles Muller Jochen Autschbach Jeanne Crassous

Electronic circular dichroism and circularly polarized luminescence acid/base switching activity has been demonstrated in helicene-bipyridine proligand 1 a and in its "rollover" cycloplatinated derivative 2 a. Whereas proligand 1 a displays a strong bathochromic shift (>160 nm) of the nonpolarized and circularly polarized luminescence upon protonation, complex 2 a displays slightly stronger emi...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید