The series of polyenes and carotenoids (1)–(4) bearing a common donor group and different acceptor groups (a)–(f) at the ends of the chain, have been synthesized; some of these compounds have been found to display efficient optical second harmonic generation.
Photoactive molecular-scale wires: synthesis of sarotene/terpyridine ditopic ligands
作者:Guillaume Pickaert、Raymond Ziessel
DOI:10.1016/s0040-4039(98)00609-1
日期:1998.5
We report the preparation of multi-component molecules based on carotene-substituted 2,2':6',6 "-terpyridine ligands. The synthetic protocol based on a double Wittig-Horner coupling reaction uses 4'-methyldiphenylphosphinoxide-2,2':6'2 "-terpyridine and the relevant carotene bis-aldehyde. The all-trans conformation of the double bonds is confirmed by proton NMR. Highly colored and redox-active ruthenium(II) dinuclear complexes have also been prepared and characterized. (C) 1998 Elsevier Science Ltd. All rights reserved.
Carotinoidsynthesen �ber Sulfone; Synthese von ?-Carotin
作者:Albert Fischli、Hans Mayer
DOI:10.1002/hlca.19750580611
日期:1975.7.16
AbstractSulfones, prepared from conjugated arylsulfonyl ylids and allylic halides, eliminate corresponding aryl sulfinates with formation of conjugated polyenes. Using this method β‐carotene (8) has been synthesized.
Intramolecular charge transfer in donor-acceptor molecules