TY - JOUR
T1 - A ring-shaped 12-Ti-substituted poly(polyoxometalate)
T2 - synthesis, structure, and catalytic properties
AU - Li, Hai Lou
AU - Lian, Chen
AU - Yang, Guo Yu
N1 - Publisher Copyright:
© 2022, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/5
Y1 - 2022/5
N2 - A new ring-shaped 12-Ti-substituted poly(polyoxometalate) (poly(POM)), K10H15[{K2Na(H2O)3}@{(Ti2O)2(Ti4O4)2(A-α-1,3,5-GeW9O36)2(A-α-2,3,4-GeW9O36)2}]·45H2O (1), has been made under hydrothermal conditions, showing the highest number of Ti centers in Keggin-type poly(POM) family to date. Its obvious feature is that two types of novel chiral trivacant [GeW9O36]14−(A-α-1,3,5-GeW9O36 and A-α-2,3,4-GeW9O36) segments have been first discovered in POM chemistry, and four [GeW9O36]14 segments are alternately connected by two Ti2O and two Ti4O4 cores to form a ring-shaped poly(POM), in which two types of linking modes, Ti2O and Ti4O4 bridging cores, are observed for the first time in POMs. The transformation of achiral precursors into chiral POM segments is of great significance for the POM synthetic chemistry. Furthermore, 1 as a heterogeneous catalyst can effectively catalyze the oxidation of various thioethers and mustard gas simulant 2-chloroethyl ethyl sulfide (CEES). [Figure not available: see fulltext.]
AB - A new ring-shaped 12-Ti-substituted poly(polyoxometalate) (poly(POM)), K10H15[{K2Na(H2O)3}@{(Ti2O)2(Ti4O4)2(A-α-1,3,5-GeW9O36)2(A-α-2,3,4-GeW9O36)2}]·45H2O (1), has been made under hydrothermal conditions, showing the highest number of Ti centers in Keggin-type poly(POM) family to date. Its obvious feature is that two types of novel chiral trivacant [GeW9O36]14−(A-α-1,3,5-GeW9O36 and A-α-2,3,4-GeW9O36) segments have been first discovered in POM chemistry, and four [GeW9O36]14 segments are alternately connected by two Ti2O and two Ti4O4 cores to form a ring-shaped poly(POM), in which two types of linking modes, Ti2O and Ti4O4 bridging cores, are observed for the first time in POMs. The transformation of achiral precursors into chiral POM segments is of great significance for the POM synthetic chemistry. Furthermore, 1 as a heterogeneous catalyst can effectively catalyze the oxidation of various thioethers and mustard gas simulant 2-chloroethyl ethyl sulfide (CEES). [Figure not available: see fulltext.]
KW - Ti-oxo cluster
KW - catalytic oxidation
KW - chiral
KW - hydrothermal synthesis
KW - polyoxometalate
UR - http://www.scopus.com/inward/record.url?scp=85127582766&partnerID=8YFLogxK
U2 - 10.1007/s11426-022-1215-1
DO - 10.1007/s11426-022-1215-1
M3 - Article
AN - SCOPUS:85127582766
SN - 1674-7291
VL - 65
SP - 892
EP - 897
JO - Science China Chemistry
JF - Science China Chemistry
IS - 5
ER -