TY - JOUR
T1 - Two new potassium borates, K4B10O15(OH) 4 with stepped chain and KB5O7(OH) 2·H2O with double helical chain
AU - Zhang, Hong Xia
AU - Zhang, Jie
AU - Zheng, Shou Tian
AU - Yang, Guo Yu
PY - 2005/1
Y1 - 2005/1
N2 - Two unusual chainlike potassium borates of K4B 10O15(OH)4 (1) and KB5O 7(OH 2·H2O (2) have been synthesized under mild solvothermal conditions at 170°C. The structures were determined by single-crystal X-ray diffraction and further characterized by FTIR, powder X-ray diffraction, and thermogravimetric analysis. Compound 1 crystallized in the monoclinic space group C2/c, a = 18.077(6) Å, b = 6.857(2) Å, c = 13.266(4) Å, β = 95.271(4)°, V = 1637.4(9) Å3, Z = 4, R = 0.0234; and compound 2 crystallized in the monoclinic space group P2(1)/c, a = 9.4824(8) Å, b = 7.5180(6) Å, c = 11.4154(6) Å, β = 97.277(3)°, V = 807.2(1) Å3, Z = 4, R = 0.0502. The stepped chains of 1 are built up from corner sharing of B3O 5(OH)23- and B4O9 6- groups to form new fundamental building blocks (FBBs) of B 5O10(OH)27- constructed by corner sharing of one B3O5(OH)23- cluster with a three-membered ring, one BO33- unit, and BO 45- tetrahedron, while the double helical chain of 2 is built up by BBBs of B5O7(OH)2-. Adjacent chains in 1 and 2 are further connected into a 3-D structure by K + cations and H-bonding interactions.
AB - Two unusual chainlike potassium borates of K4B 10O15(OH)4 (1) and KB5O 7(OH 2·H2O (2) have been synthesized under mild solvothermal conditions at 170°C. The structures were determined by single-crystal X-ray diffraction and further characterized by FTIR, powder X-ray diffraction, and thermogravimetric analysis. Compound 1 crystallized in the monoclinic space group C2/c, a = 18.077(6) Å, b = 6.857(2) Å, c = 13.266(4) Å, β = 95.271(4)°, V = 1637.4(9) Å3, Z = 4, R = 0.0234; and compound 2 crystallized in the monoclinic space group P2(1)/c, a = 9.4824(8) Å, b = 7.5180(6) Å, c = 11.4154(6) Å, β = 97.277(3)°, V = 807.2(1) Å3, Z = 4, R = 0.0502. The stepped chains of 1 are built up from corner sharing of B3O 5(OH)23- and B4O9 6- groups to form new fundamental building blocks (FBBs) of B 5O10(OH)27- constructed by corner sharing of one B3O5(OH)23- cluster with a three-membered ring, one BO33- unit, and BO 45- tetrahedron, while the double helical chain of 2 is built up by BBBs of B5O7(OH)2-. Adjacent chains in 1 and 2 are further connected into a 3-D structure by K + cations and H-bonding interactions.
UR - http://www.scopus.com/inward/record.url?scp=12844263363&partnerID=8YFLogxK
U2 - 10.1021/cg049888j
DO - 10.1021/cg049888j
M3 - Article
AN - SCOPUS:12844263363
SN - 1528-7483
VL - 5
SP - 157
EP - 161
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 1
ER -