Rational synthesis of bi- or multi-metallic nanomaterials with both dendritic and porous features is appealing yet challenging. Herein, with the cubic Cu2O nanoparticles composed of ultrafine Cu2O nanocrystals as a...

A new non-interpenetrated three-dimensional (3D) pillared-layered TPP-based LMOF [Zn3(TPyTPP)0.5(BDC)3]·8DMF (denoted as Zn-MOF 1) was successfully prepared (TPyTPP = tetrakis­(4-(pyridin-4-yl)­phenyl)­pyrazine and H2BDC = 1,4-benzenedicarboxylic acid). Zn-MOF 1 was characterized by single-crystal X-ray diffraction, PXRD, IR, N2 adsorption, thermogravimetric analysis, and luminescent spectrum. Impressively, luminescent sensing studies reveal that activated Zn-MOF 1 not only displays excellent luminescence-quenching efficiency with the values of high K sv and low LODs toward 5-hydroxytryptamine (5-HT) and 5-hydroxyindole-3-acetic acid (5-HIAA), respectively, but also possesses outstanding sensing characteristics in terms of fast response, high sensitivity, and specific selectivity. Zn-MOF 1 performs as efficient sensing of carcinoid biomarkers to provide a fresh detection platform for the diagnosis of carcinoids. In addition, the sensing mechanism was also explored on the basis of ultraviolet–visible (UV–vis) absorption, DFT calculations, and structural analysis.

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Reactions of amidinate-stabilized germylene chlorides R1Ge­(:)Cl (R1 = PhC­(NtBu)2) and R2Ge­(:)Cl (R2 = PhC­(NCy)2, Cy = cyclohexanyl) with trimethylsilylethynyl lithium salt (LLi, L = −CCTMS) afforded alkynylgermyl-substituted germylenes R1(:)­Ge-GeL3 (1) and [R2GeL2]2Ge­(:) (2), respectively. Both of them may undergo the formation of Ge–Ge single bonds with a concomitant 1,2-shift of ethynyl groups. DFT calculations determined the reaction pathways where two possible intermediates (:)­GeL2 and RGe(:)­L (R = R1, R2) are proposed, which were consistent with the trapping reactions of (:)­GeL2 toward IAr–(:)­GeL2 (3, IAr = :C­{N­(Ar)­CH}2, Ar = 2,6-iPr2C6H3). The reaction of 1 with N3TMS gave a new aminogermylene R1(:)­Ge–N­(TMS)-GeL3 (4), indicating a reactive Ge–Ge bond.

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