From molecules to materials: a new way to construct luminescent chemical bonded hybrid systems based with ternary lanthanide complexes of 1,10-phenanthroline

Wang, Qianming; Yan, Bing

doi:10.1016/j.inoche.2004.08.015

Cited by 68 publications

(9 citation statements)

References 18 publications

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“…18 Photoluminescence excitation (PLE) spectra of MPTMS-GaN NWs shown in Fig. 3 are consistent with the strong absorption band suggested at 4.6-4.8 eV, 19 in which the intensity is corrected with the C MPTMS absorption band.…”

Section: Resultssupporting

confidence: 79%

Optical properties of functionalized GaN nanowires

Hsu

Ganguly

Chen

et al. 2011

Journal of Applied Physics

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The evolution of the optical properties of GaN nanowires (NWs) with respect to a sequence of surface functionalization processes is reported; from pristine hydroxylated to finally, 3-mercaptopropyltrimethoxysilane (MPTMS) functionalized GaN NWs. Photoluminescence, Raman, stationary, and time-resolved photoluminescence measurements were applied to investigate the GaN NWs with different surface conditions. A documented surface passivation effect of the GaN NWs induced by the MPTMS functionalization is determined based on our characterization results. A hypothesis associated with the surface band bending and the defect levels near the band edges is proposed to explain the observed experimental results.

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Section: Resultssupporting

confidence: 79%

Optical properties of functionalized GaN nanowires

Hsu

Ganguly

Chen

et al. 2011

Journal of Applied Physics

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“…Our research group has focused on the covalent linking ligand of lanthanide complex to the inorganic Si-O network through different modified routes, including the modification of active amino group, hydroxyl groups and carboxyl groups with coupling agent, etc. [14][15][16][17]. These studies suggest that the thermal stabilities and photophysical properties were improved by the host.…”

Section: Introductionmentioning

confidence: 79%

A new luminescent molecular based terbium hybrid material containing both organic polymeric chains and inorganic silica networks

Sheng

Yan

2009

J Mater Sci: Mater Electron

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We have synthesized the ternary organic/ inorganic/polymeric terbium hybrid material (ACAC-Si)-Tb-PVP [ACAC = acetylacetone; PVP = poly(4-vinylpyridine)]. Firstly, the ACAC was modified through the hydrogen transfer addition reaction with a cross-linking reagent 3-(triethoxysilyl)-propyl isocyanate (TEPIC) to obtain a functional molecular bridge ACAC-Si which subsequently coordinated with Tb 3? and thus formed the inorganic Si-O-Si networks with TEOS (tetraethoxysilane) through hydrolysis and polycondensation process, and PVP acted as organic polymeric chains was synthesized using 4-vinylpyridine as the monomer after coordination with Tb(III) in the presence of BPO (Benzoyl Peroxide). For comparison, the binary hybrid material Tb-(ACAC-Si) was also prepared. The properties of the two hybrid materials were characterized in detail. The results reveal that the terbium complex was embedded into the organic polymer matrix by covalent bond with uniform microstructure. Furthermore, the distinction of the excitation spectrum between the binary and ternary hybrid materials suggests that the introduction of the polymeric organic chain component changed the microenvironment around the coordination sphere of the terbium. The emission spectrum exhibit the strong characteristic fluorescence of Tb 3? , which accounts for the efficient intro-molecular energy transfer taken place in the two hybrid materials.

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“…The synergy of the combination and the special role of the inner interfaces open up exciting novel areas in materials science. Lately, research about the covalently bonded hybrids has emerged and the as‐derived molecular‐based materials exhibit monophasic appearance even at a high concentration of rare earth complexes (7–28). Hence, the critical step to prepare these hybrids is to synthesize a novel monomer as a covalent bridge that cannot only develop chelating effects that can bind to lanthanide ions but also act as precursors of inorganic network.…”

Section: Introductionmentioning

confidence: 99%

“…Zhang and coworkers focused on modification of heterocyclic ligands including 1,10-phenanthroline and di-pyridine to construct molecular-based hybrids (7,8,(18)(19)(20). This study concerns the preparation of -NHC(=O)NH-urea bridges connecting both siliceous backbone and aromatic carboxylic acids (9,16,17,(21)(22)(23)(24)(25)(26). We propose that the precursor containing nonhydrolyzable silicon-carbon bond, coordinative activity and hydrolyzable alkoxy-silicon parts will play an important role to form covalent linkage between the two phases.…”

Section: Introductionmentioning

confidence: 99%

Molecular Assembly and Photophysical Properties of Quaternary Molecular Hybrid Materials with Chemical Bond

Yan

Qian

2007

Photochem & Photobiology

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In this paper, two long chain aliphatic carboxylic acids (oleic acid [OLA] and stearic acid [STA]) are modified with cross-linking molecules (N-2-aminoethyl-3-aminopropyl-methyl-dimethoxylsiliane, (AEAPMMS, H(2) N(CH(2))(2)HN(CH(2))(3)SiCH(3)(OCH(3))(2) and 3-aminopropyl-methyl-diethoxylsiliane (APMES, H(2) N(CH(2))(3)SiCH(3)(OC(2)H(5))(2)) resulting in four new kinds of structural molecular bridge OLA (STA)-AEAPMMS (APMES). Subsequently, ternary molecular complex systems with four molecular bridges OLA (STA)-AEAPMMS (APMES) and 2,2-bipyridyl (bipy) of lanthanides (terbium and europium) or zinc ions were assembled, which resulted in four novel kinds of quaternary molecular hybrid materials (named as bipy-Ln (Zn)-OLA (STA)-AEAPMMS (APMES) with strong chemical bonds (N-Ln(Zn)-O coordination bonds and Si-O covalent bonds) after a sol-gel (cohydrolysis and copolycondensation) process of the modified molecular bridges (as structural ligand) with inorganic precursor (tetraethoxysilane, TEOS). And especially bipy behaves as functional ligand to sensitize the luminescence of terbium or europium ions through the effective intramolecular energy transfer process, which gives rise to the characteristic emission of metal ions. The design and assembly from structural and functional ligands can help achieve a candidate technology for molecular hybrids.

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From molecules to materials: a new way to construct luminescent chemical bonded hybrid systems based with ternary lanthanide complexes of 1,10-phenanthroline

Cited by 68 publications

References 18 publications

Optical properties of functionalized GaN nanowires

Optical properties of functionalized GaN nanowires

A new luminescent molecular based terbium hybrid material containing both organic polymeric chains and inorganic silica networks

Molecular Assembly and Photophysical Properties of Quaternary Molecular Hybrid Materials with Chemical Bond

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