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Synthesis and characterization of 8-hydroxyquinoline complexes of tin(IV) and their application in organic light emitting diode.

Journal of fluorescence (2012-06-15)
Yousef Fazaeli, Mostafa M Amini, Ezzatollah Najafi, Ezeddin Mohajerani, Mohammad Janghouri, Amirreza Jalilian, Seik Weng Ng
ABSTRACT

A series of 8-hydroxyquinoline complexes of tin, Q(2)SnCl(2) (Q = 2-methyl-8-hydroxyquinoline, 8-hydroxyquinoline, 5,7-dibromo-8-hydroxyquinoline, 5-chloro-8-hydroxyquinoline, 5,7-dichloro-8-hydroxyquinoline and 5-nitro-8-hydroxyquinoline) were prepared by reacting stannous dichloride with 8-hydroxyquinoline and its derivatives. All complexes were characterized by elemental analysis, mass spectrometry and infrared, UV-vis and (1)H NMR spectroscopes. Furthermore, the molecular structure of a representative complex, dichlorido-bis(5-nitro-quinolin-8-olato-2N,O)tin(IV), was determined by single-crystal X-ray diffraction. The photoluminescence (PL) properties of all prepared compounds and electroluminescence (EL) property of a selected complex (Q = 5-chloro-8-hydroxyquinoline) were investigated. The results showed that the emission wavelength can be tuned by electron donating or withdrawing group substituent on 8-hydroxyquinoline. Application of prepared complexes in fabrication of an OLED has been demonstrated.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Tin(II) chloride, reagent grade, 98%
Sigma-Aldrich
Tin(II) chloride dihydrate, ACS reagent, 98%
Sigma-Aldrich
8-Hydroxyquinoline, ACS reagent, 99%
Sigma-Aldrich
Tin(II) chloride dihydrate, reagent grade, 98%
Sigma-Aldrich
Tin(II) chloride dihydrate, ≥99.995% trace metals basis
Sigma-Aldrich
Tin(II) chloride, anhydrous, powder, ≥99.99% trace metals basis
Sigma-Aldrich
8-Hydroxyquinoline, crystalline
Sigma-Aldrich
Tin(II) chloride dihydrate, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥98%
Sigma-Aldrich
Tin(II) chloride, ≥99.99% trace metals basis
Supelco
Tin(II) chloride dihydrate, suitable for AAS
Sigma-Aldrich
Tin(II) chloride dihydrate, ≥99.99% trace metals basis
Sigma-Aldrich
8-Quinolinol, puriss. p.a., ACS reagent, reag. Ph. Eur., ≥99% (perchloric acid titration)
Supelco
8-Quinolinol, PESTANAL®, analytical standard