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Cover Feature: 2‐(4′‐Pyridyl‐ N ‐oxide)‐Substituted Hemithioindigos as Photoresponsive Guests for a Super Aryl‐Extended Calix[4]pyrrole Receptor (Chem. Asian J. 12/2018)
Author(s) -
Moncelsi Giulia,
Escobar Luis,
Dube Henry,
Ballester Pablo
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800711
Subject(s) - photoisomerization , isomerization , pyrrole , chemistry , aryl , hydrogen bond , photochemistry , oxide , polymer chemistry , cover (algebra) , crystallography , medicinal chemistry , catalysis , molecule , organic chemistry , mechanical engineering , alkyl , engineering
E ‐HTIs can't break free ! Z ‐Hemithioindigo (HTI) N ‐oxide derivatives (HTIs) formed thermodynamically and kinetically stable 1:1 complexes with a super aryl‐extended calix[4]pyrrole, driven by the formation of four simultaneous hydrogen bonds and the deep inclusion of the HTIs in the aromatic cavity (right). Photoirradiation at 450 nm induced the isomerization of the bound HTIs affording the E ‐HTI⊂host complexes (left). The small change produced by the photoisomerization process on the stability of the complexes explains the lack of blue‐light‐induced release of the E ‐HTIs to the bulk solution. More information can be found in the Full Paper by Henry Dube, Pablo Ballester et al. on page 1632 in Issue 12, 2018 (DOI: 10.1002/asia.201800463).