Daibing Luo

Fabrication of Boron-Doped Diamond Nanorod Forest Electrodes and Their Application in Nonenzymatic Amperometric Glucose Biosensing

A boron-doped diamond nanorod forest (BDDNF) electrode has been fabricated by hot filament chemical vapor deposition (HFCVD) method. This BDDNF electrode exhibits very attractive electrochemical performance compared to conventional planar boron-doped diamond (BDD) electrodes, notably improved sensitivity and selectivity for biomolecule detection. The BDDNF electrode, with the possibility of fabricating a sensitive biosensor for glucose without any catalyst or mediators, shows good activity toward direct detection of glucose by simply putting the bare BDDNF electrode into the glucose solution. Furthermore, the marked selectivity of the BDDNF electrode is very favorable for the determination of glucose in the presence of ascorbic acid (AA) and uric acid (UA). The robust sensitive and selective responses of this nanostructure indicate the promise of this kind of diamond electrode for real applications.

A 3,4-connected beryllium phosphite framework containing 24-ring channels with a very low density.

A new three-dimensional open-framework beryllium phosphite with honeycomb-like channels has been prepared under solvothermal conditions. The alternation of a 24-ring window and a 30-ring window along its extra-large channel is unprecedented in open-framework materials. The compound has a very low density of 1.369 g cm(-3) by integrating an extra-large-pore, interrupted 3,4-connected framework and lightweight beryllium metal in its crystalline structure.

(C2H8N)2[Be3(HPO3)4]: a low-density beryllium phosphite with large 16-membered rings and helical channels

A beryllium-containing open framework, which is analogous to that found in the structure of (C2H8N)2[M3(HPO3)4] (M = Zn, Co), has a low density and represents the first example of a Be containing inorganic solid with 16-membered rings.

A facile color-tuning strategy for constructing a library of Ir(III) complexes with fine-tuned phosphorescence from bluish green to red using a synergetic substituent effect of –OCH3 and –CN at only the C-ring of C^N ligand

By simply grafting a –CN group and/or a –OCH3 group onto the meta- and/or para-site of the C-ring, a series of Ir(III) complexes bearing a similar molecular platform of bis(1,2-diphenyl-1H-benzimidazolato-N,C2′)iridium(III)(acetylacetonate), but showing fine-tuned phosphorescence covering nearly the whole window of the visible spectrum with a wide color-tuning range of 109 nm was acquired. With the help of DFT calculations, it was revealed that if the C-related arene moiety of the C^N ligand (C-ring) contributes substantially to both the HOMO and LUMO of an Ir(III) complex, the concurrent introduction of an electron-donating –OCH3 and an electron-withdrawing –CN groups on the C-ring at the meta- and para-sites relative to the Ir atom may lead to a favorable synergetic substituent effect on the color-tuning direction. This may represent a facile yet effective molecular design strategy for Ir(III) complexes with a desirous emission color. A bluish green organic light-emitting diode (OLED) based on one of the objective complexes displayed a maximum current efficiency of 62.1 cd A−1, an external quantum efficiency of 19.8%, and a brightness of 48 040 cd m−2, implying that high-performance red and blue OLED phosphors as well as libraries of Ir(III) complexes bearing similar molecular platforms may be developed through this –OCH3 and –CN synergetic substitution strategy.

New semiconducting coordination polymers from zinc sulfide clusters and chains.

Two new semiconducting zinc coordination polymers, Zn(8)S(SPh)(14)(bpy) (1) and Zn(2)(SPh)(4)(bpy) (2), have been synthesized by a dual-ligand approach. Single-crystal structural analyses indicate that compound 1 has a helical-chain structure with P1 clusters bridging with bipyridyl (bpy) ligands and compound 2 possesses a layered structure with zinc sulfide chains cross-linked with bpy ligands. The diffuse-reflectance spectra reveal that the band gaps of the two compounds are 2.41 eV for 1 and 2.56 eV for 2.

Crystalline beryllium carboxylate frameworks with rutile-type and cubic-C3N4 topologies

Two new crystalline beryllium carboxylate frameworks, formulated as (C2NH8)2[Be4(OH)4(BTC)2] (BCF-1) and (C2NH8)6[Be3(BTC)4] (BCF-2), have been synthesized under solvothermal conditions, where BTC = 1,3,5-benzenetricarboxylate. Topological analyses reveal that BCF-1 has a 3,6-connected rutile topology and BCF-2 exhibits a 3,4-connected cubic-C3N4 topology.

Solvent-free synthesis of new open-framework oxalate structures

An oxalic acid flux method has been developed to prepare new open-framework oxalate-based structures with hcb, 103, and dia topologies. It is also interesting that a new bifunctional organic ligand can be obtained from oxalate ligand and amine under the solvent-free conditions.

Crystalline beryllium carboxylate frameworks containing inorganic chains of BeO4 tetrahedra

Two crystalline beryllium carboxylates, Be2(OH)2(bdc) (BCF-3) and Be4(OH)4(btec) (BCF-4), have been prepared under hydrothermal conditions. BCF-3 has a novel zeolitic topology containing 3-ring and 14-ring windows. BCF-4 has a porous framework with a CO2 uptake capacity of 48.2 cm3 g−1 (298 K, 760 Torr).

Solvent-free synthesis of new manganese phosphate–oxalate hybrid solids

Three manganese phosphate–oxalate hybrid solids, Mn(2,2′-bpy)(H2PO4)(C2O4)0.5 (1), Mn(phen)(H2PO4)(C2O4)0.5 (2), and (4,4′-H2bpy)0.5·Mn(H2PO4)(C2O4) (3), have been prepared under solvent-free conditions. These compounds have chain-like or layered structures exhibiting photoluminescence and antiferromagnetic behavior.

Facile Access to Twisted Intramolecular Charge‐Transfer Fluorogens Bearing Highly Pretwisted Donor–Acceptor Systems Together with Readily Fine‐Tuned Charge‐Transfer Characters

Twisted intramolecular charge-transfer (TICT) fluorogens bearing highly pretwisted geometries and readily-fine-tuned charge-transfer characters are quite promising sensor and electroluminescence (EL) materials. In this study, by using 4-aryloxy-1,8-naphthalimide derivatives as the molecular framework, it is demonstrated for the first time that a CO bond could serve as the central bond to construct new TICT D-A systems. Photophysical and quantum chemical studies confirm that rotation around central CO bonds is responsible for the formation of a stable TICT state in these compounds. More importantly, owing to the structural adjustability of the aryl moiety and the strong steric interactions between the naphthalimide and the aryl ring systems, these compounds can display readily-fine-tuned TICT characters, hence exhibiting an adjustable solvent polarity threshold for aggregation-induced emission (AIE) activity, and could be AIE-active even in less-polar toluene and nonpolar cyclohexane. Furthermore, these compounds could possess highly-pretwisted ground-state geometries, hence could show good EL performance. The findings reveal a facile but effective molecular constructive strategy for versatile, high-performance optoelectronic TICT compounds.