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A new coordination polymer, [(C_(18)H_(16)N_4O_(18)Y_2)(H_2O)]n, has been hydrothermally synthesized by reacting yttrium(Ⅲ) nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1:1:1, and its structure was determined by X-ray crystallography with the following data: monoclinic system, space group C2/c, a = 13.4507(10), b = 11.5829(9), c = 16.3448(9) ?, a= 89.983(6), β = 109.056(6), g = 90.047(6)°, Z = 4, V = 2406.92(14) ?~3, F(000) = 1536, D_c = 2.13079 g/cm~3, R = 0.0284(1695) and w R = 0.0787(2014). In the asymmetric unit of the compound, each Y(Ⅲ) ion is bonded to eight oxygen atoms from 5-aminonicotinic acid and oxalate groups and terminal-coordinated water molecule, resembling a highly distorted tricapped trigonal geometry. Adjacent three yttrium atoms are bridged by three identically independent oxalate groups in a side-by-side manner to form brickwall-like 2D sheets, and these sheets are further linked through π-π stacking interactions to generate a 3D supramolecular network. The photoluminescent property of the complex was investigated and the iodine capture studies show that the porous frameworks have reversible absorption ability for iodine molecule.
A new coordination polymer, [(C_ (18) H_ (16) N_4O_ (18) Y_2) (H_2O)] n, has been hydrothermally synthesized by Yttrium (Ⅲ) nitrate with 5-aminonicotinic acid and ammonium oxalate at a molar ratio of 1: 1: 1, and its structure was determined by X-ray crystallography with the following data: monoclinic system, space group C2 / c, a = 13.4507 (10), b = 11.5829 (9), c = 16.3448 ), a = 89.983 (6), β = 109.056 (6), g = 90.047 (6) °, Z = 4, V = 2406.92 (14) ~ 3, F (000) = 1536 and D_c = 2.13079 g / cm ~ 3, R = 0.0284 (1695) and w R = 0.0787 (2014). In the asymmetric unit of the compound, each Y (III) ion is bonded to eight oxygen atoms from 5-aminonicotinic acid and oxalate groups and terminal -coordinated water molecule, resembling a highly distorted tricapped trigonal geometry. Adjacent three yttrium atoms are bridged by three identically independent oxalate groups in a side-by-side manner to form brickwall-like 2D sheets, and these sheets are further linked through π- π stacking interactions to generate a 3D supramolecular network. The photoluminescent property of the complex was investigated and the iodine capture studies show that the porous frameworks have reversible absorption ability for iodine molecule.