Conjugated microporous polymers bearing phosphonate ligands are stable and efficient for uranium extraction under highly acidic and strong radioactive conditions.
Ligand-containing conjugated microporous polymer and use thereof
申请人:SOOCHOW UNIVERSITY
公开号:US10639613B2
公开(公告)日:2020-05-05
The present invention relates to a ligand-containing conjugated microporous polymer, which is obtained by covalent coupling of a conjugated microporous polymer and a uranium complexing ligand. The conjugated microporous polymer comprises an aromatic ring and/or a heterocyclic ring. The uranium complexing ligand is selected from the group consisting of a compound with a group containing phosphorus, a compound with a group containing nitrogen, and a compound with a group containing sulfur. The invention further provides use of the ligand-containing conjugated microporous polymer as a uranium adsorbent. The ligand-containing conjugated microporous polymer the invention is capable of adsorbing the radioactive element uranium in strongly acidic and strong-radiation environments.
Polyfluorenes with Phosphonate Groups in the Side Chains as Chemosensors and Electroluminescent Materials
作者:Gang Zhou、Gang Qian、Liang Ma、Yanxiang Cheng、Zhiyuan Xie、Lixiang Wang、Xiabin Jing、Fosong Wang
DOI:10.1021/ma050807h
日期:2005.6.1
Polyfluorenes (P1 and P2) with phosphonate groups in the side chains were designed and synthesized. Their absorption and photoluminescence spectra in solutions are solvent dependent and exhibit a red shift up to 14 and 6 nm, respectively, with increasing solvent polarity. The polymers are highly soluble in ethanol with a solution photoluminescence quantum yield of 0.74. Polymer P2 in thin film cast from ethanol shows high intrachain order as revealed by red-shifted absorption spectrum and emission spectrum along with well-resolved vibronic structure. Both P1 and P2 are highly sensitive and selective Fe3+ sensory materials, and the sensitivity is much higher than that of model compounds 3 and 4. The highest sensitivity was observed with polymer P1, and a 210-fold fluorescence quenching in dichloromethane was achieved. Polymer light-emitting diodes (PLEDs) were also fabricated to investigate the electroluminescent properties. A luminous efficiency of 1.49 cd/A with Commission Internationale de L'Eclairage (CIE) coordinates of (0.171, 0.131) at 100 cd/m(2) and a maximum brightness of 1750 cd/m(2) have been demonstrated.