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21.
Dr. Waqar Rizvi Naxhije Berisha Dr. Christopher Farley Dr. N. V. S. Dinesh K. Bhupathiraju Dr. Chrysafis Andreou Emaad Khwaja German V. Fuentes Dr. Moritz F. Kircher Dr. Ruomei Gao Dr. Charles Michael Drain 《Chemistry (Weinheim an der Bergstrasse, Germany)》2019,25(64):14517-14521
Distortion of nominally planar phthalocyanine macrocycles affects the excited state dynamics in that most of the excited-state energy decays through internal conversion. A click-type annulation reaction on a perfluorophthalocyanine platform appending a seven-membered ring to the β-positions on one or more of the isoindoles distorts the macrocycle and modulates solubility. The distorted derivative enables photoacoustic imaging, photothermal effects, and strong surface-enhanced resonance Raman signals. 相似文献
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FTIR photothermal beam deflection (PBD) spectroscopy was used to record PBD spectra of IR-absorbing gases in presence of IR-absorbing and non-absorbing solids. The presence of the solid, IR-absorbing or not, causes asymmetry at the juncture of the IR and probe laser 相似文献
24.
FTIR photothermal beam deflection spectroscopy (PBDS) was used to record infrared spectra of medium-temperature carbons before and after they had been subjected to treatments with aqueous HNO3 or H2O2 solution. Changes in the functional groups present on the carbon surfaces can be clearly observed. 相似文献
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Fast atom bombardment mass spectrometry (FAB-MS) and high resolution (400 Mz) proton nuclear magnetic resonance (NMR spectroscopy) on the competitive angiotensin II antagonist, |Sar1, Tyr(Me)4 (ANGII (Sarmesin) and its he-ptapeptide homolog, [Tyr(Me)3 |ANGIII, yield spectra which provide confirmation of structure and molecular weight. The characteristics of the spectra are discussed and compared with the spectra of natural ANG II, ANG III and |Sar1|ANG II. The NMR data are suggestive of interactions in angiotensin between: 1) the phenolic hydroxyl group and the imidazole ring, and 2) the N-terminal amino group and the Tyrring. These interactions may be important for the formation of the proposed charge transfer system in angiotensin II involving the phenoxyl and α-carboxylate groups. 相似文献
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采用原位化学反应和热处理相结合的策略,在泡沫铜表面形成丝线状与花瓣状的立体无机物阵列,然后在其表面蒸镀Ag纳米颗粒(NPs),成功制备了基于泡沫铜的Ag/CuO复合光热材料。该复合材料因表面三维立体阵列结构以及Ag NPs而具备较高的太阳光吸收率。故而,Ag/CuO复合光热材料结合三聚氰胺泡沫组成的蒸发器件实现了高效的海水淡化。本研究除了探索光陷阱深度和金属掺杂对吸收体光热转换效率增强之外,还搭建了太阳能驱动界面蒸汽生成测试系统,测试了样品的光热蒸发性能。在1倍太阳(1 kW·m~(-2))辐照下,该器件整体蒸发速率高达1.097 6 kg·m~(-2)·h~(-1),即其蒸发效率可达78.38%。 相似文献
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Nathan P. Oien Luong T. Nguyen Dr. Finith E. Jernigan Prof. Melanie A. Priestman Prof. David S. Lawrence 《Angewandte Chemie (International ed. in English)》2014,53(15):3975-3978
In vivo optical imaging must contend with the limitations imposed by the optical window of tissue (600–1000 nm). Although a wide array of fluorophores are available that are visualized in the red and near‐IR region of the spectrum, with the exception of proteases, there are few long wavelength probes for enzymes. This situation poses a particular challenge for studying the intracellular biochemistry of erythrocytes, the high hemoglobin content of which optically obscures subcellular monitoring at wavelengths less than 600 nm. To address this, tunable fluorescent reporters for protein kinase activity were developed. The probing wavelength is preprogrammed by using readily available fluorophores, thereby enabling detection within the optical window of tissue, specifically in the far‐red and near‐IR region. These agents were used to monitor endogenous cAMP‐dependent protein kinase activity in erythrocyte lysates and in intact erythrocytes when using a light‐activatable reporter. 相似文献
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Yannan Zhou Qun Xu Tianpei Ge Xiaoli Zheng Li Zhang Pengfei Yan 《Angewandte Chemie (International ed. in English)》2020,59(8):3322-3328
In two‐dimensional (2D) amorphous nanosheets, the electron–phonon coupling triggered by localization of the electronic state as well as multiple‐scattering feature make it exhibit excellent performance in optical science. VS2 nanosheets, especially single‐layer nanosheets with controllable electronic structure and intrinsic optical properties, have rarely been reported owing to the limited preparation methods. Now, a controllable and feasible switching method is used to fabricate 2D amorphous VS2 and partial crystallized 2D VO2(D) nanosheets by altering the pressure and temperature of supercritical CO2 precisely. Thanks to the strong carrier localization and the quantum confinement, the unique 2D amorphous structures exhibit full band absorption, strong photoluminescence, and outstanding photothermal conversion efficiency. 相似文献
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Shuang Liu Xueting Pan Huiyu Liu 《Angewandte Chemie (International ed. in English)》2020,59(15):5890-5900
Two‐dimensional (2D) nanomaterials are currently explored as novel photothermal agents because of their ultrathin structure, high specific surface area, and unique optoelectronic properties. In addition to single photothermal therapy (PTT), 2D nanomaterials have demonstrated significant potential in PTT‐based synergistic therapies. In this Minireview, we summarize the recent progress in 2D nanomaterials for enhanced photothermal cancer therapy over the last five years. Their unique optical properties, typical synthesis methods, and surface modification are also covered. Emphasis is placed on their PTT and PTT‐synergized chemotherapy, photodynamic therapy, and immunotherapy. The major challenges of 2D photothermal agents are addressed and the promising prospects are also presented. 相似文献