Double-decker bis(tetradiazepinoporphyrazinato) rare earth complexes: crucial role of intramolecular hydrogen bondingстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 3 октября 2016 г.
Аннотация:A series of homoleptic bistetrakis(5,7-bis(4-tert-butylphenyl)-6H-1,4-diazepino)[2,3-b,g,l,q]porphyrazinato lanthanide sandwich complexes [tBuPhDzPz]2Ln (Ln = Lu, Er, Dy, Eu, Nd, Ce, La) were prepared and their physicochemical properties were studied to gain insight into the nature of specific interactions in diazepinoporphyrazines. The effect of annulated diazepine moieties and Ln ionic radius on the properties of the complexes was investigated in comparison to double-decker phthalocyanines. A combination of experimental and theoretical studies revealed the presence of two types of hydrogen bonding interactions in the metal-free porphyrazine and the corresponding sandwich complexes, namely, interligand C-Hax...Nmeso hydrogen bonding and O-H...NDz ligand-water interaction. The interligand hydrogen bonding imparts the high stability of the ligand dimer and the double-decker compounds in reduced state. This work is the first comprehensive investigation into fundamental understanding of unusual properties of diazepine-containing macroheterocycles.