State Key Laboratory of Fine Chemicals

Dalian, China

State Key Laboratory of Fine Chemicals

Dalian, China
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Zhang C.,State Key Laboratory of Fine Chemicals | Zhao J.,State Key Laboratory of Fine Chemicals | Wu S.,Dalian University of Technology | Wang Z.,State Key Laboratory of Fine Chemicals | And 4 more authors.
Journal of the American Chemical Society | Year: 2013

Resonance energy transfer (RET) was used for the first time to enhance the visible light absorption of triplet photosensitizers. The intramolecular energy donor (boron-dipyrromethene, Bodipy) and acceptor (iodo-Bodipy) show different absorption bands in visible region, thus the visible absorption was enhanced as compared to the monochromophore triplet photosensitizers (e.g., iodo-Bodipy). Fluorescence quenching and excitation spectra indicate that the singlet energy transfer is efficient for the dyad triplet photosensitizers. Nanosecond time-resolved transient absorption spectroscopy has confirmed that the triplet excited states of the dyads are distributed on both the energy donor and acceptor, which is the result of forward singlet energy transfer from the energy donor to the energy acceptor and in turn the backward triplet energy transfer. This 'ping-pong' energy transfer was never reported for organic molecular arrays, and so it is useful to study the energy level of organic chromophores. The triplet photosensitizers were used for singlet oxygen (1O 2) mediated photooxidation of 1,5-dihydroxylnaphthalene to produce juglone. The visible light absorption of the new visible light-absorbing triplet photosensitizers are higher than the conventional monochromophore based triplet photosensitizers, as a result, the 1O2 photosensitizing ability is improved with the new triplet photosensitizers. Triplet-triplet annihilation upconversion with these triplet photosensitizers was also studied. Our results are useful to design the triplet photosensitizers showing strong visible light absorbance and for their applications in photocatalysis and photodynamic therapy. © 2013 American Chemical Society.


Zhao Y.-L.,CAS Changchun Institute of Applied Chemistry | Zhao Y.-L.,Northeast Normal University | Wu G.-J.,Northeast Normal University | Han F.-S.,CAS Changchun Institute of Applied Chemistry | Han F.-S.,State Key Laboratory of Fine Chemicals
Chemical Communications | Year: 2012

The C-P bond forming reaction using electron-deficient phenol substrates was considerably challenging. Herein, we present a new protocol that allows for one-pot construction of C-P bonds via the cross-coupling of phenols and phosphine oxide or phosphite in the presence of a nickel catalyst. © 2012 The Royal Society of Chemistry.


Li Y.,CAS Changchun Institute of Applied Chemistry | Li Y.,University of Chinese Academy of Sciences | Gao L.-X.,CAS Changchun Institute of Applied Chemistry | Han F.-S.,CAS Changchun Institute of Applied Chemistry | Han F.-S.,State Key Laboratory of Fine Chemicals
Chemical Communications | Year: 2012

We present a new protocol that allows for the synthesis of 2,5-disubstituted tetrazoles via the direct coupling of N-H free tetrazoles and low toxic boronic acids in the presence of only a catalytic amount of Cu 2O (5 mol%) as catalyst and 1 atm of environmentally benign O 2 as oxidant, without the need for other additives. This method represents a simple, green, and atom-efficient synthesis of 2,5-disubstituted tetrazoles. This journal is © The Royal Society of Chemistry 2012.


Yuan F.-Q.,CAS Changchun Institute of Applied Chemistry | Yuan F.-Q.,University of Chinese Academy of Sciences | Han F.-S.,CAS Changchun Institute of Applied Chemistry | Han F.-S.,State Key Laboratory of Fine Chemicals
Organic Letters | Year: 2012

A novel protocol for the highly stereoselective synthesis of E,E-α,β,γ,δ-unsaturated dicarbonyl compounds is presented. Starting from the readily available allylic alcohols and 1,3-diketones, an array of E,E-α,β,γ,δ-dienones can be efficiently synthesized in high yields via Pd-catalyzed dehydrative allylation, H-migration, and aerobic oxidative δ-hydride elimination cascade. In addition to the novel reaction mechanism, the use of 1:1 allylic alcohol and 1,3-diketone as reactant, 5 mol % of PdCl 2 as catalyst, and 1 atm of environmentally benign O 2 as oxidant, as well as the generation of only H 2O byproduct, makes this protocol rapid, simple, atom-efficient, and clean. © 2012 American Chemical Society.


Li K.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Materials Research Bulletin | Year: 2010

On the basis of the viewpoint of structure-property relationship in solid state matters, we proposed some useful relations to quantitatively calculate the electronic polarizabilities of binary and ternary chalcopyrite semiconductors, by using electronegativity and principal quantum number. The calculated electronic polarizabilities are in good agreement with reported values in the literature. Both electronegativity and principal quantum number can effectively reflect the detailed chemical bonding behaviors of constituent atoms in these semiconductors, which determines the magnitude of their electronic polarizabilities. The present work provides a useful guide to compositionally design novel semiconductor materials, and further explore advanced electro-optic devices. © 2009 Elsevier Ltd. All rights reserved.


Liu F.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Materials Research Bulletin | Year: 2010

A chemical strategy has been purposely designed to hierarchically assemble nanoscale building blocks at the interface of solution/solid. Typically, a solution containing precursor of one component and a metal foil as metal source of another component were employed, on the basis of proposed chemical reactions on expected interfaces. Proper reaction parameters including temperature, pH value etc. were selected to adapt both chemical reactions in solution and on the metal surface. Consequently, at the interface of solution and metal foil, two kinds of nanoscale building blocks deposited simultaneously leading to the current hierarchical assembly. This strategy has been applied to the fabrication of a series of functional materials, including Nb2O5/TiO2, Nb2O5/LiF and ZnO/Co3O4. The current strategy provides a convenient one-step route to achieve complex functional structures, which may have potential applications in a variety of fields such as solar cells, Li-ion batteries, electrochemical supercapacitors, catalysts as well as chemical, gas, and bio-sensors. © 2009 Elsevier Ltd. All rights reserved.


Wu J.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Materials Research Bulletin | Year: 2010

An alcohol thermal technique was applied to the controlled growth of hexagonal ZnO architectures via selective chemical etching. ZnO microdisks were produced first under mild alcohol thermal conditions in presence of formamide. Due to a higher surface energy/atomic density of Zn2+ {0 0 0 1} than that of the other faces, hexagonal ZnO microring was obtained by selectively etching positive polar surface of disk-like precursor with a high density of planar defects at the center. The selective etching of ZnO is related to its crystallographic characteristics of surface polarity and chemical activities, which opens a new opportunity for the shape-controlled synthesis of wurtzite-structured materials. © 2009 Elsevier Ltd. All rights reserved.


Liu M.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Materials Research Bulletin | Year: 2010

Hollow micro-sized H2(H2O)Nb2O6 spheres constructed by nanocrystallites have been successfully synthesized via a bubble-template assisted hydrothermal process. In the reaction process, H2O2 acts as a bubble generator and plays a key role in the formation of the hollow structure. An in situ bubble-template mechanism has been proposed for the possible formation of the hollow structure. The spherelike assemblies of these H2(H2O)Nb2O6 nanoparticles have been transformed into their corresponding pseudohexagonal phase Nb2O5 through a moderate annealing dehydration process without destroying the hierarchical structure. Optical properties of the as-prepared hollow spheres were investigated. It is exciting that the absorption edge of the hollow Nb2O5 microspheres shifts about 18 nm to the violet compared with bulk powders in the UV/vis spectra, indicating its superior optical properties. © 2009 Elsevier Ltd. All rights reserved.


Wu J.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Materials Research Bulletin | Year: 2010

Morphology-tuned ZnO microcrystals can be prepared by oxidizing zinc metal substrates in aqueous solution using hydrothermal technique. Some typical ZnO growth morphologies such as nanorod superstructures, nanorod arrays, microspheres, hierarchical nanostructures, and split crystals have been chemically fabricated. These microscopic shapes can be finely controlled by selecting Zn(NO3)2 concentration and solvent. A conceptual model was proposed to explain the formation of the as-prepared ZnO structures by selecting proper kinetic environments. This one-step, wet-chemical approach is controllable and reproducible, which can be conveniently transferred to industrial applications. © 2009 Elsevier Ltd. All rights reserved.


Wu J.,State Key Laboratory of Fine Chemicals | Xue D.,State Key Laboratory of Fine Chemicals
Science of Advanced Materials | Year: 2011

The intense interest in zinc oxide (ZnO) materials stems from their attractive semiconducting properties and wide potential applications. Technical control over the growth of ZnO and comprehensive study of its physical and chemical natures are of great significance in understanding the crystal growth mechanism and further developing new ZnO-based functional devices. This review presents a brief summary of recent research activities on the science and technology of ZnO as advanced material with an emphasis on the latest development in property study and chemical synthesis of ZnO structures. The solution-phase routes to grow bulk ZnO crystals, thin films, hollow structures, and nanoparticles will be detailedly demonstrated. Finally, we will briefly discuss some typical applications of ZnO devices for sensors, dye-sensitized solar cells, and field emission. © 2011 American Scientific Publishers.

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