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Title: Synthesis and Crystallization Behavior of Surfactants with Hexamolybdate as the Polar Headgroup

Journal Article · · Inorganic Chemistry
 [1];  [2];  [2];  [2];  [2];  [3];  [4]
  1. Beijing Union Univ. (China); Tsinghua Univ., Beijing (China). Dept. of Chemistry
  2. Tsinghua Univ., Beijing (China). Dept. of Chemistry
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Chemical and Engineering Materials Division. Neutron Sciences Directorate
  4. Tsinghua Univ., Beijing (China). Dept. of Chemistry; Peking Univ., Beijing (China). State Key Lab. of Natural and Biomimetic Drugs

For this paper, alkyl chains with different lengths were covalently grafted onto the surface of hexamolybdate through the postfunctionalization protocol of polyoxometalates. The obtained compounds represent typical structures of the so-called giant surfactants. Unexpectedly, those surfactants with hexamolybdates as polar headgroups are able to crystallize, while single-crystal X-ray diffraction reveals that the crystallization behavior of the surfactants is highly dependent on the length of the alkyl chains. For surfactants with comparatively short alkyl chains (C6 and C10), the alkyl chains prefer to interact with tetrabutylammonium, the countercation of hexamolybdate. However, the alkyl chains tend to pack with each other to form a domain of alkyl chains in the surfactant with a longer alkyl chain (C18). Finally, the possible mechanism is that a long alkyl chain cannot be fully compatible with the short chain (C4) of tetrabutylammonium.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); Tsinghua Univ. (China)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1265575
Journal Information:
Inorganic Chemistry, Vol. 54, Issue 13; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Effects of chain length on the size, stability, and electronic structure of redox-active organic–inorganic hybrid polyoxometalate micelles journal January 2019
[V 4 Mo 3 O 14 (NAr) 32 -NAr) 3 ] 2− : the first polyarylimido-stabilized molybdovanadate cluster journal January 2017
Conductive Inorganic-Organic Hybrid Layered Crystals Composed of Keggin-Type Polyoxotungstates and a Heterocyclic Surfactant: Conductive Inorganic-Organic Hybrid Layered Crystals Composed of Keggin-Type Polyoxotungstates and a Heterocyclic Surfactant journal August 2018
The crystal packing, morphology and hydrophobicity of polyoxometalate-based amphiphilic materials journal January 2020
Conductive Supramolecular Architecture Constructed from Polyoxovanadate Cluster and Heterocyclic Surfactant journal January 2018
Structural variation determined by length-matching effects: towards the formation of flexible porous molecular crystals journal January 2018
Conductive Hybrid Crystal Composed from Polyoxomolybdate and Deprotonatable Ionic-Liquid Surfactant journal June 2016
Hybrid polyoxometalates as post-functionalization platforms: from fundamentals to emerging applications journal January 2020