Scientific Reports
·
2016
·Vol. 6
·期 1
·1-5
·
IF 5.228
Ling Yun,Xie Wen Chang,Liu Guo Kun,Yan Run Wen,Wu De Yin,Tang Jing
Inter- and intra- molecular hydrogen bonding plays important role in determining molecular structure, physical and chemical properties, which may be easily ignored for molecules with a non-typical hydrogen bonding structure. We demonstrated in this paper that the hydrogen bonding is responsible for the different Raman spectra in solid and solution states of p-Nitrothiophenol (PNTP). The consistence of the theoretical calculation and experiment reveals that the intermolecular hydrogen bonding yields an octatomic ring structure (8) of PNTP in the solid state, confirmed by the characteristic S-H---O stretching vibration mode at 2550 cm −1 ; when it comes to the solution state, the breakage of hydrogen bond of S-H---O induced the S-H stretching vibration at 2590 cm −1 . Our findings may provide a simple and fast method for identifying the intermolecular hydrogen bonding.
研究领域:
化学
·
光谱学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2017
·
IF 4.536
Samrat Devaramani,Xiaofang Ma,Shouting Zhang,Mahgoub Ibrahim Shinger,Dongdong Qin,Duoliang Shan,Xiaoquan Lu
Axial ligation property of metalloporphyrins has got vital importance in the architecture of donor–acceptor dyads, 3D cages and modular assemblies made up of porphyrins. Nitrogenous ligands have been extensively used in this regard. In this paper, we made a unique attempt to axially ligate thiol-appended molecule to tetraphenylporphyrinato zinc(II), (ZnTPP). Taking the advantage of photoexcitation of metalloporphyrins, axial ligation of 1-dodecanethiol (DDT) to ZnTPP in the presence of visible light was invented. This has been ascertained by recording the charge transfer between ZnTPP and DDT. Photoinduced axial ligation of DDT to ZnTPP under visible light was studied by varying the wavelength and intensity of the light source. The axial ligation reaction was found to be photoswitching and wavelength selective. The binding constant of the ZnTPP–DDT complex was found to be comparable with that of ligands bind to ZnTPP though nitrogen. The consequence of the axial ligation on the HOMO and LUMO and the photoinduced charge transfer kinetics of the planar chromophore, ZnTPP were studied. Scanning electrochemical microscope was used to extract the heterogeneous charge transfer constant values in the case of ZnTPP and ZnTPP–DDT at the film/electrolyte solution.
研究领域:
化学
·
光化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2020
·Vol. 16
·期 35
·2003357
·
IF 11.459
Simin Feng,Junyang Tan,Shilong Zhao,Shuqing Zhang,Usman Khan,Lei Tang,Xiaolong Zou,Junhao Lin,Hui-Ming Cheng,Bilu Liu
Monolayer transition metal dichalcogenides are 2D materials with many potential applications. Chemical vapor deposition (CVD) is a promising method to synthesize these materials. However, CVD-grown materials generally have poorer quality than mechanically exfoliated ones and contain more defects due to the difficulties in controlling precursors' distribution and concentration during growth where solid precursors are used. Here, thiol is proposed to be used as a liquid precursor for CVD growth of high quality and uniform 2D MoS 2 . Atomic-resolved structure characterizations indicate that the concentration of sulfur vacancies in the MoS 2 grown from thiol is the lowest among all reported CVD samples. Low temperature spectroscopic characterization further reveals the ultrahigh optical quality of the grown MoS 2 . Density functional theory simulations indicate that thiol molecules could interact with sulfur vacancies in MoS 2 and repair these defects during the growth of MoS 2 , resulting in high-quality MoS 2 . This work provides a facile and controllable method for the growth of high-quality 2D materials with ultralow sulfur vacancies and high optical quality, which will benefit their optoelectronic applications.
研究领域:
材料科学
·
纳米技术
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Wenting Lan,Changgan Lai,Yasheng Dai,Shijiao Fu,Chenjie Gu,Tao Jiang,Yuning Pan
The early and reliable detection of prostate cancer remains a significant challenge in clinical diagnostics. This study presents a quantitative immunoassay for prostate-specific antigen (PSA) using a surface-enhanced Raman scattering (SERS) substrate comprised of polymer-silver nanocubes (Ag NCs) modified with 4-mercaptobenzoic acid (4MBA). We investigated the impact of thiol-containing internal standards (IS) on the quantitative accuracy of SERS, highlighting the superior stability of 4MBA compared to non-thiol molecules like crystal violet (CV). In contrast to CV, 4MBA exhibited significantly greater stability, with only a 9.3% decrease in characteristic peak intensity after prolonged storage. Furthermore, the quantitative detection of PSA was realized using an IS-mediated sandwich immunostructure. Particularly, the coefficient of determination (R 2 ) for the PSA standard calibration curve demonstrated remarkable enhancement from 0.987 to 0.994, highlighting the advantage of thiol-anchored IS correction strategy. Moreover, the limit of detection (LOD) for PSA was refined to 5.6 × 10 -10 mg/mL after a perfect linear fitting was facilitated using 4MBA-based IS correction, which was superior to standard enzyme-linked immunosorbent assay (ELISA) and comparable SERS techniques. In addition, the specificity of the assay was confirmed by the lack of signal for non-target antigens. These findings demonstrate that the strategic selection of robust IS molecules can significantly enhance the quantitative capabilities of SERS technology, paving the way for its application in clinical diagnostics.
研究领域:
医学诊断
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纳米技术
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ting Ying,Nicolas Onofrio,Liang Mei,Huarong Peng,Zhen Zhang,Meng Gu,Chen Ma,Ye Chen,Jiang Zhou,Kenneth M. Y. Leung,Chong Cheng,Shuang Li,Bilu Liu,Chuyang Y. Tang,Damien Voiry,Zhiyuan Zeng
2D transition-metal dichalcogenides (TMDs) based nanolaminates are promising candidates for water purification. However, fabricating nanochannels with tunable capillary widths remain a challenge. This study proposed a sulfur vacancy functionalization strategy for fabricating high performance nanolaminate membranes by grafting three kinds of thiol (S-H) containing molecules (Cysteine, 3-Mercapto-1,2-propanediol, 1-Propanethiol) on MoS 2 nanosheets, in which propanethiol functionalized MoS 2 membrane exhibited best salt rejection (99.3%) and water/salt selectivity (800 bar −1 ) in forward osmosis (draw solution: sucrose solution). It is found the capillary width increased from 0.2 Å in pristine MoS 2 to ≈5 Å in propanethiol functionalized MoS 2 membranes. Numerical simulations suggest that nanofluidic properties of the functionalized membranes are governed by the fundamental interaction between water and the corresponding S-H functional group, and the interlayer distance. Importantly, since the S-H containing molecules can repair MoS 2 nanosheets by fitting into the sulfur vacancies, the stability of the membranes is also improved with minimal swelling, which is promising for their practical applications.
研究领域:
材料科学
·
纳米技术
·
膜科学
·
水净化
·
流体动力学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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