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Copper Nanowires: A Substitute for Noble Metals to Enhance Photocatalytic H2 Generation

21-Jul-2015 | Shuning Xiao; Peijue Liu; Wei Zhu; Guisheng Li; Dieqing Zhang; Hexing Li, Nano Letters, 2015

Microwave-assisted hydrothermal approach was developed as a general strategy to decorate copper nanowires (CuNWs) with nanorods (NRs) or nanoparticles (NPs) of metal oxides, metal sulfides, and metal organic frameworks (MOFs). The microwave irradiation induced local “super hot” dots generated on ...

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Photoconversion of β-Lapachone to α-Lapachone via a Protonation-Assisted Singlet Excited State Pathway in Aqueous Solution: A Time-Resolved Spectroscopic Study

20-Jul-2015 | Lili Du; Ming-De Li; Yanfeng Zhang; Jiadan Xue; Xiting Zhang; Ruixue Zhu; Shun Cheung Cheng; Xuechen Li; David Lee P ..., The Journal of Organic Chemistry, 2015

The photophysical and photochemical reactions of β-lapachone were studied using femtosecond transient absorption, nanosecond transient absorption, and nanosecond time-resolved resonance Raman spectroscopy techniques and density functional theory calculations. In acetonitrile, β-lapachone ...

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Benzo[c,d]indole‐Containing Aza‐BODIPY Dyes: Asymmetrization‐Induced Solid‐State Emission and Aggregation‐Induced Emission Enhancement as New Properties of a Well‐Known Chromophore

17-Jul-2015 | Soji Shimizu , Ai Murayama, Takuya Haruyama, Taku Iino, Shigeki Mori, Hiroyuki Furuta , Nagao Kobayashi , Chemistry - A European Journal, 2015

Abstract A series of symmetric and asymmetric benzo[c,d]indole‐containing aza boron dipyrromethene (aza‐BODIPY) compounds was synthesized by a titanium tetrachloride‐mediated Schiff‐base formation reaction of commercially available benzo[c,d]indole‐2(1H)‐one and heteroaromatic amines. These ...

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IJERPH, Vol. 12, Pages 8263-8280: Cobalt Oxide Nanoparticles: Behavior towards Intact and Impaired Human Skin and Keratinocytes Toxicity

17-Jul-2015 | Mauro, Marcella ; Crosera, Matteo ; Pelin, Marco ; Florio, Chiara ; Bellomo, Francesca ; Adami, Gianpiero ; Apostoli ..., International Journal of Environmental Research and Public Health, 2015

Skin absorption and toxicity on keratinocytes of cobalt oxide nanoparticles (Co3O4NPs) have been investigated. Co3O4NPs are commonly used in industrial products and biomedicine. There is evidence that these nanoparticles can cause membrane damage and genotoxicity in vitro, but no data are ...

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Synthesis and Optical Properties of a Series of Green‐Light‐Emitting 2‐(4‐Phenylquinolin‐2‐yl)phenol–BF2 Complexes (Boroquinols)

15-Jul-2015 | Umamahesh Balijapalli, Sathiyanarayanan Kulathu Iyer, European Journal of Organic Chemistry, 2015

Abstract A series of 2‐(4‐phenylquinolin‐2‐yl)phenol derivatives were efficiently synthesized and complexed with boron trifluoride to give fluorescent organoboron complexes. All the synthesized compounds were characterized by 1H, 13C, 11B, 19F NMR, FTIR, and HRMS analyses, and single‐crystal ...

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Dendrimer nanotechnology for enhanced formulation and controlled delivery of resveratrol

14-Jul-2015 | Abhay S. Chauhan, Annals of the New York Academy of Sciences, 2015

In spite of its wide and beneficial pharmacological potential, resveratrol lags behind other compounds because of its comparatively less impressive pharmacokinetic profile. Resveratrol has very low oral bioavailability and, from a formulation perspective, it has low solubility in water, which ...

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In vitro evaluation of biopolymer networks based on crosslinked cellulose with various diamines

14-Jul-2015 | Nasim Movagharnezhad, Peyman Najafi Moghadam, Journal of Applied Polymer Science, 2015

ABSTRACT In this study, we investigated some hydrogels based on natural, biodegradable, and biocompatible polysaccharides and cellulose, as sustained release carriers and evaluated their controlled drug release. The crosslinking of bromoacetylated cellulose with various aliphatic and aromatic ...

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Quantitative Intramolecular Singlet Fission in Bipentacenes

14-Jul-2015 | Samuel N. Sanders; Elango Kumarasamy; Andrew B. Pun; M. Tuan Trinh; Bonnie Choi; Jianlong Xia; Elliot J. Taffet; Jon ..., Journal of the American Chemical Society, 2015

Singlet fission (SF) has the potential to significantly enhance the photocurrent in single-junction solar cells and thus raise the power conversion efficiency from the Shockley–Queisser limit of 33% to 44%. Until now, quantitative SF yield at room temperature has been observed only in crystalline ...

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Contribution of Aggregate States and Energetic Disorder to a Squaraine System Targeted for Organic Photovoltaic Devices

13-Jul-2015 | Chenyu Zheng; Anirudh Raju Penmetcha; Brandon Cona; Susan D. Spencer; Bi Zhu; Patrick Heaphy; Jeremy A. Cody; Christ ..., Langmuir, 2015

Squaraine dyes have significant potential for use in organic photovoltaic devices because their chemical and packing structure tunability leads to a broad solid state panchromaticity. Nevertheless, broadening of the spectrum does not always give rise to increasing power conversion efficiencies. ...

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Ultrafast photoinduced dynamics of the organolead trihalide perovskite CH3NH3PbI3 on mesoporous TiO2 scaffolds in the 320–920 nm range

08-Jul-2015 | Oliver Flender; Johannes R. Klein; Thomas Lenzer; Kawon Oum, Physical Chemistry Chemical Physics, 2015

We present femtosecond broadband transient absorption experiments for the investigation of the carrier dynamics in the organolead trihalide perovskite CH3NH3PbI3. The perovskite was prepared on a mesoporous TiO2 scaffold either by 1-step deposition from solution or by 2-step methods employing ...

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