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A novel 12-ring network coordination polymer, {[Cu(C_4N_2H_ 10 )_4]_2 H_4V_4O_ 14 }_ %n% (denoted as QUST-4), was hydrothermally synthesized and structurally determined by X-ray single-crystal diffraction analysis. QUST-4 was crystallized in a monoclinic system with space group %P2_1/n%. The parameters of the unit cell are %a%=1.0497(2) nm, %b%=1.6728(3) nm, %c%=1.2857(3) nm, %β%=94.14(3)°, %V%=2.2517(8) nm~3, %Z%=4, %D%_ cal = 1.841 Mg/m~3, %R%_1=0.1071, and %wR%_3=0.2703. The largest difference peak and hole were 2284 and -1040 e/nm~3, respectively. The SBU(secondary building unit) of QUST-4 was a new cyclo- aggregate of polyoxovanadate cyclo-[H_4V_4O_ 14 ]~ 4- , different from cyclo-[V_4O_ 12 ]~ 4- , which was condensed from two tetrahedral and two trigonal bipyramids via alternate {arrangement.} Cu(piper)_4(piper=piperazine) group connected the cyclo-[H_4V_4O_ 14 ]~ 4- anions to form the 12-ring network. The adjacent layers were linked by van der Walls forces.
A novel 12-ring network coordination polymer, was hydrothermally synthesized synthetically determined by X-ray single-crystal diffraction analysis. {[Cu (C_4N_2H_10) _4] _2H_4V_4O_14} _% n% QUST-4 was crystallized in a monoclinic system with space group% P2_1 / n%. The parameters of the unit cell are% a% = 1.0497 (2) nm,% b% = 1.6728 (3) nm,% c% = 1.2857 (3) nm,% β% = 94.14 (3) °,% V% = 2.2517 (8) nm ~ 3,% Z% = 4,% D% _cal = 1.841 Mg / m ~ 3,% R% _1 = 0.1071, and% wR% _3 = 0.2703. The largest difference peak and hole were 2284 and -1040 e / nm ~ 3, respectively. The SBU (secondary building unit) of QUST- 4 was a new cyclo- aggregate of polyoxovanadate cyclo - [H_4V_4O_14] ~ 4-, different from cyclo- [V_4O_12] ~ 4-, which was condensed from two tetrahedral and two trigonal bipyramids via alternate {arrangement.} Cu (piper) _4 (piper = piperazine) group connected the cyclo- [H_4V_4O_14] ~ 4-anions to form the 12-ring network. The adjacent layers were linked by van der Walls forces.