开发绿色安全,高效和可回收的催化剂对化学工业至关重要。到目前为止,与传统的金属催化相比,有机光催化已被证明是一种环保且节能的合成技术。作为通用的催化平台,可以轻松制备具有大表面积和高稳定性的超交联聚合物(HCP)。在本报告中,我们成功构建了两种具有s-四嗪单元和表面积大于700 m 2 g -1的多孔HCP光催化剂(TZ-HCP)。通过Friedel-Crafts烷基化反应。合理的能带结构以及微孔和中孔的共存赋予TZ-HCP优异的活性,可在乙醇中实现苯并咪唑的绿色合成(28例,产率高达99%,0.5-4.0 h)。此外,至少进行了21次由TZ-HCP1D介导的迭代催化运行,产率为96-99%。这项有关TZ-HCP的研究为将HCP用作制备精细化学品的无金属和绿色光催化剂提供了广阔的前景。
A Novel Conjugated Polymer Consists of Benzimidazole and Benzothiadiazole: Synthesis, Photophysics Properties, and Sensing Properties for Pd
<sup>2+</sup>
作者:Kuan Liu、Zijun Hu
DOI:10.1002/pol.20200005
日期:2020.3.15
sonogashira cross‐couplingreaction. The chemical structures of the monomers and the polymer were indicated by 1H NMR, and investigation of photophysics properties and sensing optical properties for metal ions were observed by ultraviolet–visible and photoluminescence spectroscopy. PPBIBTE showed remarkable selectivity for Pd2+ by “turn‐off” fluorescence sensing progress. In addition, the Stern–Volmer
constructed two porous HCP photocatalysts (TZ-HCPs) featuring s-tetrazine units and surface areas larger than 700 m2 g−1 through Friedel–Crafts alkylation reactions. The rational energy-band structures and coexisting micro- and mesopores endow TZ-HCPs with excellent activities to realize the green synthesis of benzimidazoles (28 examples, up to 99% yield, 0.5–4.0 h) in ethanol. Furthermore, at least 21
开发绿色安全,高效和可回收的催化剂对化学工业至关重要。到目前为止,与传统的金属催化相比,有机光催化已被证明是一种环保且节能的合成技术。作为通用的催化平台,可以轻松制备具有大表面积和高稳定性的超交联聚合物(HCP)。在本报告中,我们成功构建了两种具有s-四嗪单元和表面积大于700 m 2 g -1的多孔HCP光催化剂(TZ-HCP)。通过Friedel-Crafts烷基化反应。合理的能带结构以及微孔和中孔的共存赋予TZ-HCP优异的活性,可在乙醇中实现苯并咪唑的绿色合成(28例,产率高达99%,0.5-4.0 h)。此外,至少进行了21次由TZ-HCP1D介导的迭代催化运行,产率为96-99%。这项有关TZ-HCP的研究为将HCP用作制备精细化学品的无金属和绿色光催化剂提供了广阔的前景。
Boosting charge separation in conjugated microporous polymers <i>via</i> fluorination for enhancing photocatalysis
作者:Penghao Sun、Peigen Wang、Dong Yan、Qian Liu、Weijie Zhang、Jiyong Deng、Qingquan Liu
DOI:10.1039/d2cy01294d
日期:——
and promote charge separation in CMPs by selectively employing carbazole as the donor and fluorinated precursors as the acceptor, respectively. As a result, a series of fluorinated CbzCMP-n (n = 10–12) featuring π-conjugates of the donor (D)–acceptor (A) structure is obtained, in which both their effective charge separation and transfer and broadly visible light absorbance are facilitated. The fluorinated