http://dx.doi.org/10.1002/ejic.201100972">
 

Document Type

Journal Article

Authors

Qian Liu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Lei Hu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Hui Fu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Jun Yang, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Qiao-Min Fu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Li Liu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Shi-Zhong Liu, Min. of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, School of Chemistry and Chemical Engineering, Hubei University
Zu-Liang Du, Key Laboratory of Special Functional Materials, Henan University
Cheuk-Lam Ho, Institute of Molecular Functional Materials, Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist UniversityFollow
Feng-Rong Dai, Institute of Molecular Functional Materials, Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist University
Wai-Yeung Wong, Institute of Molecular Functional Materials, Department of Chemistry and Centre for Advanced Luminescence Materials, Hong Kong Baptist UniversityFollow

Department/Unit

Department of Chemistry

Title

Langmuir–Blodgett films of hexamolybdate and naphthylamine prepared by two different approaches: synthesis, characterization, and materials properties

Language

English

Abstract

Two novel covalently-linked organic-inorganic hybrid compounds [(n-C 4H 9) 4N] 2[Mo 6O 18{≡N-(2-Np)}] (NA-Mo6) and [(n-C 4H 9) 4N] 2[Mo 6O 17{≡N- (1-Np)} 2] (NA2-Mo6) (2-Np = 2-naphthyl; 1-Np = 1-naphthyl) have been prepared by the reaction of 2-naphthylamine (2-NpNH 2) or 1-naphthylamine (1-NpNH 2) with [(n-C 4H 9) 4N] 2[Mo 6O 19] (Mo6) in the presence of N,N′-dicyclohexylcarbodiimide (DCC) in anhydrous acetonitrile, and have been characterized by 1H NMR, IR, UV/Vis, and fluorescence spectra as well as X-ray crystallography. Structural analyses reveal the formation of self-assembled infinite 1-D and 3-D supramolecular frameworks. The UV/Vis spectra of NA-Mo6 and NA2-Mo6 show that the lowest energy electronic transfers occur at 362 and 394 nm, respectively, which are dramatically red-shifted when compared to that of Mo6. The luminescence studies show that Mo6 can notably quench the emission of naphthylamine. Monolayer and multilayer films of NA-Mo6 and NA2-Mo6 were fabricated on different substrates by the Langmuir-Blodgett (LB) technique using H 2O as the subphase. For comparison, another two types of organic-inorganic hybrid films composed of noncovalently-linked 1-NpNH 2/Mo6 and 2-NpNH 2/Mo6 systems were also deposited onto the same substrates under the same conditions by the LB technique using an aqueous solution of Mo6 as the subphase. The as-prepared organic-inorganic hybrid films were characterized by π-A isotherms, UV/Vis absorption spectra, photoluminescence spectra, and scanning tunneling microscopy. The results indicate that stable monolayers can be formed at the air-water interface for NA-Mo6 and NA2-Mo6, and at the air-Mo6 solution interface for 1-NpNH 2 and 2-NpNH 2. The four LB films containing NA-Mo6, NA2-Mo6, 1-NpNH 2/Mo6, and 2-NpNH 2/Mo6 display interesting electrical conductivity. Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

Langmuir-Blodgett films, Organic-inorganic hybrid composites, Self-assembly, Thin films

Publication Date

2012

Source Publication Title

European Journal of Inorganic Chemistry

Volume

2012

Issue

4

Start Page

684

End Page

694

Publisher

Wiley-VCH Verlag

ISSN (print)

14341948

ISSN (electronic)

10990682

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