Charge-transfer photoluminescence of polyoxo-tungstates and -molybdates

Yamase, Toshihiro; Sugeta, M.

doi:10.1039/dt9930000759

Cited by 74 publications

(90 citation statements)

References 35 publications

(8 reference statements)

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“…[72][73][74] The hopping of a d 1 electron over the lattice is a quenching channel against the energy transfer from the LMCT states to the emitting levels of Eu 3þ , due to the ease of recombination between the d 1 electron and the hole as a result of decreased disparity between the nuclear configurations of the excited and ground states of the POM www.afm-journal.de ligand. [75] In this case, the hopping delocalization of d 1 , which shows a high emission yield with a decrease of the temperature. [76,77] Therefore, for the EPW solid at room temperature, the excitation spectrum only consists of sharp lines of Eu 3þ characteristic transitions with no LMCT band detected.…”

Section: Photoluminescent Propertiesmentioning

confidence: 99%

Organized Nanostructured Complexes of Polyoxometalates and Surfactants that Exhibit Photoluminescence and Electrochromism

Zhang

Liu

Kurth

et al. 2009

Adv Funct Materials

143

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A variety of functional nanostructured organic/inorganic hybrid materials from the europium‐exchanged derivative of a Preyssler‐type polyoxometalate (POM), [EuP5W30O110]12−, and functional organic surfactants were prepared by the ionic self‐assembly (ISA) route. The effect of organic surfactants on the structure, photoluminescent, electrochemical and electrochromic properties of the POM anions was investigated in detail. All obtained hybrid materials are amphotropic, i.e., exhibit both thermotropic and lyotropic liquid‐crystalline phase behaviour. Investigations of their photophysical properties have shown that the interactions of the various surfactants with the polyanions influence the coordination environments and site symmetry of Eu3+ in different ways. The functional groups in the organic surfactants significantly influence the electrochromic properties and photoluminescence of POMs. Different from normal and pyridine‐containing complexes, no photoluminescence and no electrochromism were observed from the ferrocene‐containing complexes. This may be explained in view of charge transfer between the POM anion and the ferrocenyl group.

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Section: Photoluminescent Propertiesmentioning

confidence: 99%

Organized Nanostructured Complexes of Polyoxometalates and Surfactants that Exhibit Photoluminescence and Electrochromism

Zhang

Liu

Kurth

et al. 2009

Adv Funct Materials

143

View full text Add to dashboard Cite

show abstract

“…They have many important practical applications, such as the luminophores for lamps or screens, laser, electroluminescent optical devices and probes [4,5]. The luminescence characteristics of lanthanide-POMs and their intramolecular energy transfers have been reported [6][7][8][9]. The application of lanthanide-POMs in optical devices depends on their successful fabrication of thin films.…”

Section: Introductionmentioning

confidence: 99%

Self-assembled multilayer films of europium-substituted polyoxometalate and their luminescence properties

Wang

Zheng

Wang

et al. 2004

Journal of Alloys and Compounds

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“…[19][20][21][22][23] As a result, the preparation of hybrid materials containing these species is now being investigated. [24][25][26][27][28][29][30][31][32] Francesconi and co-workers recently described Mg-Al LDHs intercalated by luminescent polyoxometalate anions with Dawson-like [Eu(H 2 O) 3 [32] In the present work, new polyoxotungstoeuropate anion-pillared layered double hydroxides were prepared by anion exchange reactions of a Zn-Al LDH precursor in nitrate form.…”

Section: Introductionmentioning

confidence: 99%