Synthesis, characterization, photophysical and oxygen-sensing properties of a copper(I) complex

Abstract

In this paper, we report the synthesis, crystal structure, photophysical properties, and electronic nature of a phosphorescent Cu(I) complex of [Cu(TBT)(POP)]BF 4 , where TBT and POP stand for 4,5,9,14-tetraaza-benzo[b]-triphenylene and bis(2-(diphenylphosphanyl)phenyl) ether, respectively. [Cu(TBT)(POP)]BF 4 renders a red phosphorescence peaking at 622 nm, with a long excited-state lifetime of 13.2 ls. Density functional calculation reveals that the emission comes from a triplet metal-to-ligandcharge-transfer excited state. We electrospun composite nanofibers of [Cu(TBT)(POP)]BF 4 and polystyrene, hoping to explore the possibility of replacing precious-metal-based oxygen sensors with cheap Cu-based ones. The finally obtained samples with average diameter of *700 nm exhibit a maximum sensitivity of 5.8 toward molecular oxygen with short response/recovery time (5/13 s) due to the large surface-area-to-volume ratio of nanofibrous membranes. No photobleaching is detected in these samples. All these results suggest that phosphorescent Cu(I) complexes doped nanofibrous membranes are promising candidates for low-cost and quick-response oxygen-sensing materials.

Aggregation-Induced Emissive Copper(I) Complexes for Living Cell Imaging

“…Cu(I) complexes possess d 10 electronic structure and provide a tunable phosphorescent emission at room temperature and a long luminescence lifetime of several microseconds. To date, a series of Cu(I) complexes has been applied in OLED, − solar-energy conversion devices, , and chemosensors. − Unfortunately, no example of a phosphorescent Cu(I) complex has been reported in application of luminescent bioimaging due to the instability caused by the oxidization and disproportionation of the Cu(I) ion. In the past decade, the study of phosphorescent Cu(I) complexes has mainly focused on Cu(I)–diimine complexes, especially the mixed-ligand Cu(I)–diimine–diphosphine [Cu(diimine)(PP)] + and [Cu 2 (diimine) 2 (PP) 2 ] 2+ (PP = diphosphine ligand) complexes due to the relatively abundant resource, less expensive noble-metal-free characteristics, controllable electronic and stereochemical characteristics of ligands, and good luminescent performance. − A recent report showed some Cu(I)–diimine–diphosphine complexes can be used as photosensitizers for photocatalytic reduction of protons from water at room temperature .…”

Fifty Shades of Phenanthroline: Synthesis Strategies to Functionalize 1,10-Phenanthroline in All Positions

“…Phendione 867 is probably one of the most versatile building blocks ever used to functionalize phen. A plethora of articles describes the synthesis of 867 . ,,,− The common point to all the reported procedures is the strongly acidic (ensuring phen is protonated and increasing the solubility) and oxidizing conditions. Phendione can be further transformed into precious synthons for numerous applications.…”

“…Interestingly, the [Ru­(II)­(bpy) 2 ( 69 )] 2+ complex exhibits residual luminescence that is quenched in the presence of protic solvents and enhanced in apolar medium, a feature that has been extensively utilized for the design of intercalative DNA probes . The dppz ligand 69 or its derivatives have been described in a plethora of papers for various applications (biology (refs , , , , , , − , , ), electron transfer, , luminescence, ,,,, organic electronics, ,,, sensors, , electrochromism, etc. ).…”

Preparation, characterisation and biological activity of some metal complexes derived from new dithiocarbamate of heterocyclic ligand

“…dissolved in THF and (2.5g, 4 mmol) of KOH in 10 ml of water, and then (2.54g, 3 mmol) CS 2 added in portions while cooling and vigorously stirring, with the temperature kept below 0 °C. The brown product then separated, dried, and recrystallised from 1: 1 methanol-water.m.p=153 ˚C, Yield (2.95g, 53 percent ) 3.2.1 Synthesis of potassium quinoxaline-2,3-diylbis(p-tolylcarbamodithioate) (L) [21] Ligand was synthesised using a modified technique from the literature. A mixture of (2g, 1 mmol) of 2,2'-oxalylbis(1-phenylhydrazine-1carbodithioate)(B)was added to O-phenylen diammine (0.666g, 1 mo) the raw material was purified out, and the pure desired brown product was recrystallized from 1.76 g yield (50 percent ).…”