Porous coordination polymers of transition metal sulfides with PtS topology built on a semirigid tetrahedral linker.
Four novel porous metal sulfide coordination polymers, [M(tpom)S(x)(SH)(y)] x z(H(2)O) (metal-sulfide frameworks, denoted MSF-n, n = 1, Cd; 2, Mn; 3, Fe; 4, Co; x = 0, y = 2 for 1, 2, and 4 and x = 0.54, y = 1.46 for 3), were solvothermally prepared by using a quadridentate linker, tetrakis(4-pyridyloxymethylene)methane (tpom), in the presence of organic sulfur compound under an acidic conditions. MSF-n (n = 1-4) is isostructural and built upon the tetrahedral tpom linker and square planar MS(x)(SH)(y) unit, which form a binodal 4,4-connected porous framework with a 2-fold interpenetrated 4(2)8(4)-pts net. With rectangular pore channels of about 5 x 6 A(2) (interatomic distances between the nearest protruding H atoms across) running along both the crystallographic a and b directions, MSF-n possesses permanent porosity with a BET surface area of 575, 622, 617, and 767 m(2)/g for MSF-1, -2, -3, and -4, respectively, as estimated from N(2) adsorption measurements. MSF-n (n = 1-4) has hydrogen storage capacities of 1.03, 1.37, 1.29, and 1.58 wt % at 77 K and 1 atm, respectively, each corresponding to 2.0 H(2) molecules per unit cell. In addition, MSF-n (n = 1-4) can adsorb 24.1, 25.0, 21.6, and 24.1 wt % of carbon dioxide and 6.0, 6.1, 5.6, and 6.4 wt % of methane, respectively, at room temperature and 20 atm.
Zhang
Jun
J
State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.
Xue
Yun-Shan
YS
Liang
Li-Li
LL
Ren
Shi-Bin
SB
Li
Yi-Zhi
YZ
Du
Hong-Bin
HB
You
Xiao-Zeng
XZ