Cerium bis(tetradiazepinoporphyrazinate): synthesis and peculiarities of spectral and electrochemical behavior

Abstract

A cerium sandwich double-decker complex of tetradiazepinoporphyrazine was synthesized for the first time, which exhibited specific spectral and electrochemical properties.

Electrochemical and spectroelectrochemical studies of tert-butyl-substituted aluminum phthalocyanine

“…In general, the spectroelectrochemical data corresponded well to the typical ring-based UV-vis changes in the redox behavior of metallophthalocyanines having redox inactive metal center [44][45][46]. However, the peak at 646 nm behaved differently from other bands (Fig.…”

Double-decker bis(tetradiazepinoporphyrazinato) rare earth complexes: crucial role of intramolecular hydrogen bonding

“…In this study, we extended our previous work [30][31][32] and synthesized a series of double-decker complexes, including representatives of early, middle and late lanthanides (Scheme 1). Hitherto undescribed double-decker complexes of erbium (2b), dysprosium (2c) and europium (2d) were prepared and purified in the same manner as previously reported 2e,g 31 (Scheme 1 and Table S1).…”

“…Since the distance between the decks in each sandwich complex 2 is smaller compared to ligand dimer 1, it can be assumed that water will be located outside the complexes near the N Dz atoms as in the case of 1. 32 Full assignment of proton signals in the NMR spectra was made using COSY and NOESY 2D NMR spectroscopy (Table 1 and Figs. S20-S36).…”

“…2f was characterized in our previous paper. 32 Bis{tetrakis(5,7-bis(4-tert-butylphenyl)-6H-1,4-diazepino)-[2,3-b,g,l,q]porphyrazinato}lanthanum (2g). UV-vis (CH 2 Cl 2 ) λ max /nm (log ε): 373 (5.25), 638 (5.31), 674 (5.02).…”

“…Recently, we reported the first examples of tetradiazepinoporphyrazine-based sandwich-type lanthanide complexes and assumed the presence of additional intramolecular interactions between the macrocycles. [30][31][32] To shed light on the nature of the specific interactions in diazepinoporphyrazines, herein we provide the first comprehensive study on a series of sandwich double-decker tetradiazepinoporphyrazine lanthanide compounds including a detailed experimental characterization and theoretical study of the corresponding free-base porphyrazine. Insights into the self-assembly of the complexes are provided, which can be further exploited in future work.…”