Results 31 to 40 of about 983 (189)

Synthesis and structure of push–pull merocyanines based on barbituric and thiobarbituric acid

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2019
Two compounds, 1,3-diethyl-5-{(2E,4E)-6-[(E)-1,3,3-trimethylindolin-2-ylidene]hexa-2,4-dien-1-ylidene}pyrimidine-2,4,6(1H,3H,5H)-trione or TMI, C25H29N3O3, and 1,3-diethyl-2-sulfanylidene-5-[2-(1,3,3-trimethylindolin-2-ylidene)ethylidene ...
Georgii Bogdanov   +3 more
doaj   +1 more source

Optimizing the second-order optical nonlinearities of organic molecules: asymmetric cyanines and highly polarized polyenes [PDF]

open access: yes, 1993
e recently reported that there is an optimal combination of donor and acceptor strengths for a given molecular length and bridge structure that maximizes (beta) .
Cheng, Lap-Tak A.   +3 more
core   +1 more source

Spiropyran polymeric microcapillary coatings for photodetection of solvent polarity [PDF]

open access: yes, 2013
Fused silica micro-capillaries were functionalised with spiropyran-polymer brushes using surface-initiated ring-opening metathesis polymerisation. Based on the inherited spiropyran properties, the functionalised capillaries were successfully used to ...
Benito-Lopez, Fernando   +3 more
core   +1 more source

La dégénérescence mésomérique des colorants polyméthiniques

open access: yesCHIMIA, 1961
Toute matière colorée organique est représentée par des formules électromères limites caractérisées par l’ensemble d’un groupe donneur d’électrons, d’un groupe polarisable et d’un groupe capteur d’électrons. La structure réelle de cette substance est un
A. van Dormael
doaj   +1 more source

Новые анионные полиметины флуоренового ряда [PDF]

open access: yes, 2017
Синтезирован винилогический ряд анионных полиметиновых красителей на основе трис(2,2,3,3,4,4,5,5- октафторпентил)-9H-флуорен-2,4,7-трисульфоната. Показано, что в отличие от аналогичных красителей производных полинитрофлуоренов у них наиболее интенсивным
Ищенко, А.А.   +2 more
core   +1 more source

Transient absorption spectroscopy on spiropyran monolayers using nanosecond pump–probe Brewster angle reflectometry [PDF]

open access: yes, 2013
Self-assembled monolayers of 11-(3’,3’-dimethyl-6,8-dinitrospiro[chromene-2,2’-indoline]-1’-yl) undecanoic acid (amphiphilic spiropyran) at the air–water interface are studied using Brewster angle reflectometry.
Aarts   +40 more
core   +1 more source

Photo-responsive graphene and carbon nanotubes to control and tackle biological systems [PDF]

open access: yes, 2018
Photo-responsive multifunctional nanomaterials are receiving considerable attention for biological applications because of their unique properties. The functionalization of the surface of carbon nanotubes (CNTs) and graphene, among other carbon based ...
Cardano, Francesca   +2 more
core   +1 more source

The Synthesis and Spectral Properties of Merocyanine Dyes Based on 9H‑Fluorene-2,7-Dicarbonitrile

open access: yesЖурнал органічної та фармацевтичної хімії
Di-, tetra-, and hexamethine merocyanine dyes bearing donor heterocyclic end groups of different electron-donating abilities and the 9H-fluorene-2,7-dicarbonitrile moiety as the acceptor end group have been synthesized.
Iryna V. Kurdiukova   +2 more
doaj   +1 more source

Structural and quantum chemical analysis of exciton coupling in homo- and heteroaggregate stacks of merocyanines

open access: yesNature Communications, 2016
Exciton coupling between organic dyes is important for opto-electronic and photovoltaic devices and it is well-known that strong coupling occurs between equal chromophores.
David Bialas   +4 more
doaj   +1 more source

Photoswitching Conduction in Framework Materials

open access: yesAdvanced Functional Materials, EarlyView.
This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez   +4 more
wiley   +1 more source

Home - About - Disclaimer - Privacy