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Mesostructure organic‐inorganic hybrid ionic liquids based on heteropoly acids: Effect of linkage on the molecular structure and catalytic activity
Author(s) -
Shahebrahimi Shabnam,
Rafiee Ezzat,
Sadrjavadi Komail
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.5170
Subject(s) - chemistry , catalysis , ionic liquid , potentiometric titration , ionic bonding , inorganic chemistry , substrate (aquarium) , hybrid material , electrochemistry , organic chemistry , electrode , ion , oceanography , geology
The new inorganic–organic hybrids based on SO 3 H‐functionalized ionic liquids (ILs) and Keggin‐type heteropoly acids (H 3 PW 12 O 40 , H 3 PMo 12 O 40 , and H 4 SiW 12 O 40 ; HPAs) are prepared and characterized by FT‐IR, NMR, XRD, CV, SEM/EDX, ICP‐OES, BJH and UV. Different molecular structures according to the different inorganic part were also proved. Potentiometric titration showed a good relationship between catalytic activity and acidity of the catalysts. Electrochemical aspects showed electron transfer ability of the compounds. For understanding catalytic activities of the HPA‐IL hybrids in N‐formylation reaction, effect of catalyst composition, substrate, and reaction conditions were studied. The best SO 3 H‐functionalized ionic liquid catalyst was readily recovered and reused for four runs. Easy preparation of the catalyst, simple and easy work‐up, mild reaction conditions, low cost, excellent yields and short reaction times are the key features of this work.