Phase-mediated controllable intramolecular and intermolecular photocycloadditions assisted by supramolecular templates  

作　　者：Yi-Shou Wang Li-Ying Sun Yao-Yu Wang Ying-Feng Han 

机构地区：[1]Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education,Xi’an Key Laboratory of Functional Supramolecular Structure and Materials,College of Chemistry and Materials Science,Northwest University,Xi’an,710127,China

出　　处：《Science China Chemistry》2022年第6期1129-1133,共5页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (22025107, 21722105);the National Youth Top-notch Talent Support Program of China;the Key Science and Technology Innovation Team of Shaanxi Province (2019TD-007, 2019JLZ-02);Xi’an Key Laboratory of Functional Supramolecular Structure and Materials;the FM&EM International Joint Laboratory of Northwest University。

摘　　要：Understanding and controlling supramolecular template effect assembly via a photochemical reaction in different solid and solution phases is one of the main topics in photochemistry. Here, an interesting case of phase-mediated controllable intramolecular/intermolecular photochemical [2+2] cycloadditions assisted by supramolecular templates was demonstrated. Direct irradiation of the complexes in solution yields intramolecular photoproducts exclusively, whereas exposure of the solid powder sample under the same conditions yields intermolecular dinuclear species quantitatively. The nature of the phase and supramolecular interaction affects the geometrical arrangements of the metallacycles, leading to different cycloaddition products under photoirradiation. The crystal structures of different products were investigated by single-crystal X-ray diffraction, nuclear magnetic resonance(NMR) spectrometry, and electrospray ionization mass spectrometry(ESI-MS).

关 键 词：N-heterocyclic carbene photochemical cycloaddition template synthesis TOPOCHEMISTRY stacking interactions 

分 类 号：O641.3[理学—物理化学] O644.11[理学—化学]