Preorganization in a Cleft-Type Anion Receptor Featuring Iodo-1,2,3-Triazoles As Halogen Bond Donors
摘要:
Preorganization via intramolecular hydrogen bonds was applied in a cleft-type receptor by exploiting the excellent halogen bond donor ability as well as hydrogen bond acceptor function of iodo-1,2,3-triazoles. As investigated by isothermal calorimetric titrations, the restriction of conformational freedom causes an enhanced entropic contribution resulting in a strongly increased binding affinity. This efficient way to improve the binding strength of 5-halo-1,2,3-triazoles paves the way for applications of new charge-neutral halogen bond donors in solution.
A convenient synthesis of 3,6-substituted carbazoles via nickel catalyzed cross-coupling
作者:Minnie Park、Jason R. Buck、Carmelo J. Rizzo
DOI:10.1016/s0040-4020(98)00786-8
日期:1998.10
Alkyl, vinyl and aryl substituted carbazoles at the 3- and 6-positions are prepared in high yield from the corresponding 3,6-dibromocarbazole via nickel catalyzed coupling with Grignard reagents (Corriu-Kumada coupling).
Ni(COD)2 coupling of 3,6-dibromocarbazoles as a route to all-carbazole shape persistent macrocycles
作者:Leah S. Coumont、Jonathan G.C. Veinot
DOI:10.1016/j.tetlet.2015.08.048
日期:2015.10
The number of applications for carbon-based materials has experienced tremendous growth over the last decade arising from their low toxicity, straight-forward chemical modification, and interesting electronic properties. Among these materials, self-assembled structures based on shape persistent macrocycles are perhaps the most exciting as they offer a means to prepare a wide range of morphologies through reversible assembly of these molecular precursors. In this letter, we report on the preparation of a novel family of all-carbazole shape persistent macrocycles through the simple single-step reaction of the corresponding 3,6-dibromocarbazoles over Ni(COD)(2). The resultant macrocycles display optical properties characteristic of the parent N-alkyl polycarbazoles, with quantum yields ranging from 11% up to 21% suggesting that certain substituents induce the formation of highly emissive aggregates, which could potentially provide a mechanism for the preparation of functional self-assembled nanomaterials. (C) 2015 Elsevier Ltd. All rights reserved.
Stereoselective synthesis and luminescence properties of novel trans-regular N-alkylcarbazolylene–silylene–vinylene polymers
Novel trans-stereoregular silylene-carbazolylene-vinylene derivatives (13-15) were synthesized via silylative coupling reaction of 3,6-bis(dimethylvinylsilyl)-N-alkylcarbazole (7-9) catalyzed by ruthenium-hydride complex RuHCl(CO)(PCy3)(2) (1). All products were isolated, fully characterized by spectroscopic methods and GPC analyses and their absorption and fluorescence properties were determined. (C) 2013 Elsevier B. V. All rights reserved.
COPOLYMER, ORGANIC SOLAR CELL USING THE SAME AND MANUFACTURING METHOD THEREOF
申请人:Kim Jinseok
公开号:US20130056073A1
公开(公告)日:2013-03-07
Disclosed herein are a 3,6-carbazole-containing copolymer, an organic solar cell comprising the copolymer in an organic material layer including a photoactive layer, and a method for fabricating the organic solar cell.
Preorganization in a Cleft-Type Anion Receptor Featuring Iodo-1,2,3-Triazoles As Halogen Bond Donors
作者:Ronny Tepper、Benjamin Schulze、Helmar Görls、Peter Bellstedt、Michael Jäger、Ulrich S. Schubert
DOI:10.1021/acs.orglett.5b02760
日期:2015.12.4
Preorganization via intramolecular hydrogen bonds was applied in a cleft-type receptor by exploiting the excellent halogen bond donor ability as well as hydrogen bond acceptor function of iodo-1,2,3-triazoles. As investigated by isothermal calorimetric titrations, the restriction of conformational freedom causes an enhanced entropic contribution resulting in a strongly increased binding affinity. This efficient way to improve the binding strength of 5-halo-1,2,3-triazoles paves the way for applications of new charge-neutral halogen bond donors in solution.