Dibenzo[d,f][1,3] dioxepine derivatives: A review

Abstract

This review presents a survey of synthetic methods and reaction mechanism of the dibenzo[d,f][1,3] dioxepine derivatives. Furthermore, the influence of the substituent groups in 6,6′‐position of dibenzo[d,f][1,3] dioxepine on their conformation is explored. The functional dibenzo[d,f][1,3] dioxepine synthetically versatiles substrate, as they can be used for synthesis of a large variety of π‐conjugated oligomer and polymer containing heterocyclic compounds, such as dibromination dibenzo[d,f][1,3] dioxepine derivative as a raw material of synthesis for organic semiconductor polymers. The synthetic and fluorescent property of π‐conjugated polymers basic on dibenzo[d,f][1,3] dioxepine also is explored. J. Heterocyclic Chem., (2012).

An efficient Ce-doped MoO3 catalyst and its photo-thermal catalytic synergetic degradation performance for dye pollutant

“…In the past decades, the photo degradation technology of organic compounds has gained widespread attention [1][2][3][4][5]. Regrettably, its practical application is limited by a low utilization efficiency of solar energy and a low quantum efficiency [6][7][8][9][10][11].…”

Photocatalytic Behaviors of TiO2 Nanoblets Coated with MoS2 Nanosheets for Solar‐Driven Photocatalysis

“…It was obviously that the maximum absorption peaks for MB, MO and RhB and pure MoS 2 NSs only had intensity decreasing, however, absorption peaks for TiO 2 NBs and T@M had not only intensity decreasing but also blue shift. It has been reported there are two pathways to degrade MB, MO and RhB . One is the cleavage of whole conjugated chromospheres structure by active groups that degrade MB, MO and RhB to final products, such as CO 2 , H 2 O and SO 4 2− etc .…”

“…This way can only cause the intensity decreasing. The other one is the N ‐demethylation (for MB and MO) or N ‐deethylation (for RhB) that can lead the peaks blue‐shift . N ‐demethylation of MB was observed by Mohammad and Morrison .…”

“…There are two major pathways of degrading dyes . First and foremost degradation pathway is that active groups (produced by photocatalysts) degrade dyes to final products, e. g. CO 2 , H 2 O . Another pathway, demethylation (or deethylation), may coexist in degradation process, which will cause peak shift in absorption spectra .…”

“…First and foremost degradation pathway is that active groups (produced by photocatalysts) degrade dyes to final products, e. g. CO 2 , H 2 O . Another pathway, demethylation (or deethylation), may coexist in degradation process, which will cause peak shift in absorption spectra . However, in the process of degradation, the inherent factors why demethylation (or deethylation) exists in some experiments but doesn't in others’ is not definite.…”