Synthesis and photophysics of a fullerene-triquinoxaline ensemble
作者:Francesco P. Ballistreri、Andrea Pappalardo、Gaetano A. Tomaselli、Giuseppe Trusso Sfrazzetto、Elisa Vittorino、Salvatore Sortino
DOI:10.1039/c0nj00481b
日期:——
In this contribution, we report the synthesis and photophysical characterization of a molecular conjugate, in which C60 is covalently attached to a triquinoxaline-based cavitand through a pyrrolidine ring. Comparative experiments performed by using suitable model compounds demonstrate negligible interactions between the quinoxaline chromophores and the fullerene centre in the ground state. On the other
Controllable Selective Functionalization of a Cavitand via Solid State Photolysis of an Encapsulated Phenyl Azide
作者:Gerald Wagner、Vladimir B. Arion、Lothar Brecker、Carsten Krantz、Jean-Luc Mieusset、Udo H. Brinker
DOI:10.1021/ol901122h
日期:2009.7.16
Phenyl azide (1) has been encapsulated within cavitand 2 to form a 1:1 complex of 1@2 in the solidstate. Subsequent irradiation affords two diastereomeric nitrene addition products 5 and 7. The ratio of 5 and 7 can be reversed by thermally induced valence isomerization to 1H-azepine 8 followed by photolysis. In sharp contrast, phenylnitrene generation by photolysis of the corresponding 1.5:1 complex
Triptycene-Roofed Quinoxaline Cavitands for the Supramolecular Detection of BTEX in Air
作者:Federico Bertani、Nicolò Riboni、Federica Bianchi、Giovanna Brancatelli、Elizabeth S. Sterner、Roberta Pinalli、Silvano Geremia、Timothy M. Swager、Enrico Dalcanale
DOI:10.1002/chem.201504229
日期:2016.3.1
Two novel triptycene quinoxaline cavitands (DiTriptyQxCav and MonoTriptyQxCav) have been designed, synthesized, and applied in the supramolecular detection of benzene, toluene, ethylbenzene, and xylenes (BTEX) in air. The complexation properties of the two cavitands towards aromatics in the solid state are strengthened by the presence of the triptycene moieties at the upper rim of the tetraquinoxaline
作者:Víctor García‐López、Michal Zalibera、Nils Trapp、Martin Kuss‐Petermann、Oliver S. Wenger、François Diederich
DOI:10.1002/chem.202001788
日期:2020.9.4
Resorcin[4]arenecavitands, equipped with diverse quinone (Q) and [Ru(bpy)2dppz]2+ (bpy=2,2′‐bipyridine, dppz=dipyrido[3,2‐a:2′,3′‐c]phenazine) photosensitizing walls in different configurations, were synthesized. Upon visible‐light irradiation at 420 nm, electron transfer from the [Ru(bpy)2dppz]2+ to the Q generates the semiquinone (SQ) radical anion, triggering a large conformational switching from