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Cheng Huo

Publications and source records attributed to Cheng Huo.

4 recordsLinked to original sources
PubMed2006

Synthesis and assembly with mesoporous silica MCM-48 of platinum(II) porphyrin complexes bearing carbazyl groups: spectroscopic and oxygen sensing properties.

The synthesis and spectroscopic characterization of a series of luminescent platinum meso-tetrakis{3,5-di[(N-carbazyl)n-alkyloxyphenyl]}porphyrin (Pt-8Cn-TPP, n-alkyl = (CH2)n, n = 4, 6, and 8) are presented. The protonated platinum porphyrins ([Pt-8Cn-TPPH8]8+) were assembled with mesoporous silica MCM-48 resulting in the assembly materials [Pt-8Cn-TPPH8]8+/MCM-48. The luminescence of [Pt-8Cn-TPPH8]8+/MCM-48 can be extremely quenched by molecular oxygen with very high sensitivity (I0/I100 > 5000) and rapid response time (0.04 s) suggesting that the [Pt-8Cn-TPPH8]8+/MCM-48 system can be employed to develop high performance oxygen sensors. Among this assembly system, [Pt-8C8-TPPH8]8+/MCM-48 exhibits the highest sensitivity. Even if the concentration of oxygen is 0.1%, the luminescence intensity of [Pt-8C8-TPPH8]8+/MCM-48 can be quenched by 86%.

Journal Article↗
PubMed2006

Synthesis, structures, and luminescent properties of phenol-pyridyl boron complexes.

Syntheses of the four mixed phenol-pyridine derivatives 1,6-bis(2-hydroxyphenyl)pyridyl boron naphthalene (1), 1,6-bis(2-hydroxy-5-methylphenyl)pyridyl boron naphthalene (2), 1,6-bis(2-hydroxyphenyl)pyridyl boron 2-methoxylbenzene (3), and 1,6-bis(2-hydroxy-5-methylphenyl)pyridyl boron 2-methoxylbenzene (4) are reported. The structures of the boron compounds 1, 3, and 4 were determined by single-crystal X-ray diffraction. The molecular packing is characterized by intermolecular pi...pi and hydrogen-bonding interactions. DSC analysis demonstrates that 1 and 2 have good thermal stability with higher glass transition temperatures (Tg) and melting points (Tm) than 3 and 4. Boron complexes 1-4 display bright blue luminescence in solution and the solid state. White and blue electroluminescent (EL) devices were fabricated successfully using these boron compounds.

Boron Compounds↗
PubMed2002

[An experimental investigation of deep burn by constant low heat].

OBJECTIVE: To investigate the basic pathogenetic rule and mechanism of deep burn by constant low heat. METHODS: Animal burn model inflicted by constant low heat was established as follows. (1) The rats were randomly divided into groups in terms of temperature and duration of contact. The burn wound formation process, the skin tissue density and pathomorphological changes in the rats were observed after burn was produced on the back by contacting heat source constantly. (2) The subcutaneous temperature of the back was monitored at different time and temperatures of heat contacting by placing the thermometer under the fascia of the rat back. RESULTS: (1) The time of burn wound formation was shortened and the injury degree deepened along with the increase in the contact temperature. The rat skin density exhibited irregular hyperbola or triple curves. (2) The subcutaneous temperature exhibited a parabolic curve with fixed experimental conditions. CONCLUSION: (1) The sharp increase in subcutaneous temperature leading to degeneration and necrosis might be the primary cause of deep burn. (2) The regularity of the skin tissue injury was the result of multiple effects of heat-origin injury, increase of capillary permeability and the change in tissue mass.

Animals↗