Synthesis of photochromic spirooxazines from 1-amino-2-naphthols
摘要:
A synthetic access to photochromic spirooxazines is developed through the condensation of methylene-substituted azaheterocycles on 1-amino-2-naphthols in presence of an oxidizing agent. Compared to usual preparation of this kind of compounds (via 1-nitroso-2-naphthols), yields are generally good and approaches to Further spiroheterocyclic oxazines are possible. (C) 1997 Elsevier Science Ltd.
[EN] MAGNETICALLY BISTABLE COMPLEXES AND DEVICES AND METHODS OF MAKING AND USING THE SAME<br/>[FR] COMPLEXES BISTABLES MAGNÉTIQUEMENT ET DISPOSITIFS ET PROCÉDÉS DE PRÉPARATION ET D'UTILISATION DE CEUX-CI
申请人:UVIC IND PARTNERSHIPS INC
公开号:WO2017015765A1
公开(公告)日:2017-02-02
Disclosed herein are embodiments of complexes exhibiting reversible light-induced magnetization switching with unprecedented lifetimes. In particular embodiments, the complexes are provided as organic thin films that can exhibit long lifetimes at ambient temperatures. In some representative embodiments, the complex comprises an electronically bistable cobalt complex functionalized with an optically bistable ligand. A photoisomerization-induced spin–charge excited state (PISCES) process can occur, resulting in the direct observation of light-induced spin state switching at room temperature in the solid state.
A synthetic access to photochromic spirooxazines is developed through the condensation of methylene-substituted azaheterocycles on 1-amino-2-naphthols in presence of an oxidizing agent. Compared to usual preparation of this kind of compounds (via 1-nitroso-2-naphthols), yields are generally good and approaches to Further spiroheterocyclic oxazines are possible. (C) 1997 Elsevier Science Ltd.
A Solution- and Solid-State Investigation of Medium Effects on Charge Separation in Metastable Photomerocyanines
作者:Dinesh G. Patel、Michelle M. Paquette、Roni A. Kopelman、Werner Kaminsky、Michael J. Ferguson、Natia L. Frank
DOI:10.1021/ja100238h
日期:2010.9.15
zwitterionic structure in high-polarity solvents. The effect of azahomoadamantyl substitution is explored by comparing 1 and 2 with the analogous indolyl derivatives, spiro[indoline-isoquinolinoxazine] (3) and spiro[indoline-phenanthrolinoxazine] (4) through XRD analysis of the closed spirooxazine (SO) forms, solution-state kinetic experiments, solvatochromism, and NMR studies. Longer C(spiro)-O bond lengths