98556-86-6Relevant academic research and scientific papers
Dense Alkyne Arrays of a Zr(IV) Metal-Organic Framework Absorb Co(CO) for Functionalization
Cheng, Shengxian,Diao, Yingxue,He, Jun,Hu, Jieying,Hu, Xiangzi,Li, Mu-Qing,Li, Yang Yang,Ma, Feixiang,Xu, Zhengtao
, (2020/04/10)
Finely dispersed Co(0) and CoO species were efficiently loaded into a stable metal-organic framework to impart catalytic activities to the porous solid. The metalation of the MOF host is facilitated by the dense arrays of accessible alkyne units that boost the alkyne-Co(CO) interaction. The tetrakis(4-carboxylphenylethynyl)pyrene linker, with eight symmetrically backfolded alkyne side arms, features strong fluorescence and a dendritic Sierpinski shape. The resultant Zr(IV)-MOF features NU-901 topology (scu net, with rhombus channels) and breathing properties (e.g., the contracted (porous) phase reverts to the as-made phase upon contact with DMF (dimethylformamide)). The inserted Co(CO) guests quickly react with air to form atomically dispersed CoO species (nondiffracting), and subsequent thermal treatment at 600 °C of the CoO-loaded solid generates an electrocatalyst for the oxygen evolution reaction (OER).
A Porous and Solution-Processable Molecular Crystal Stable at 200 °c: The Surprising Donor-Acceptor Impact
Cheng, Shengxian,Ma, Xiaoxia,He, Yonghe,He, Jun,Zeller, Matthias,Xu, Zhengtao
, p. 7411 - 7419 (2019/12/02)
We report a curious porous molecular crystal that is devoid of the common traits of related systems. Namely, the molecule does not rely on directional hydrogen bonds to enforce open packing, and it offers neither large concave faces (i.e., high internal f
Dramatic improvement of stability by: In situ linker cyclization of a metal-organic framework
Hou, Yun-Long,Li, Mu-Qing,Cheng, Shengxian,Diao, Yingxue,Vilela, Filipe,He, Yonghe,He, Jun,Xu, Zhengtao
, p. 9470 - 9473 (2018/08/28)
We employ a two-step strategy for accessing crystalline porous covalent networks of highly conjugated π-electron systems. For this, we first assembled a crystalline metal-organic framework (MOF) precursor based on Zr(iv) ions and a linear dicarboxyl linker molecule featuring backfolded, highly unsaturated alkyne backbones; massive thermocyclization of the organic linkers was then triggered to install highly conjugated, fused-aromatic bridges throughout the MOF scaffold while preserving the crystalline order. The formation of cyclized carbon links not only greatly strengthens the precursor coordination scaffold, but also, more importantly, enhances electroactivity and charge transport throughout the polycyclic aromatic grid.
