JOURNAL OF HETEROCYCLIC CHEMISTRY
·
2024
·
IF 2
Ling Li,Yinuo Yao,Xiaowan Wang,Yaoqi Yu,Tailong Ji,Han Li,Yi Li,Yuanyuan Liu
A highly selective fluorescent sensor Por-RBO for determination of Hg 2+ was designed and synthesized with Rhodamine B and Tetraphenylporphyrin. The sensor can determine the Hg 2+ of a solution within the pH 5.0–8.0, free from interference of other metal ions. When detected in buffer solution, the fluorescence was the strongest when five times the concentration of Hg 2+ ion was added. Calculated by fluorescence titration method, the detection limit of sensor Por-RBO for Hg 2+ ion was as low as 0.12 μmol/L. The geometries of Por-RBO and Por-RBO -Hg 2+ were optimized at the B3LYP/6-31G** level by density functional theory. The charge distribution, orbital interactions, and bonding characteristics were analyzed and compared in detail to discuss the recognition mechanism and structure–fluorescence property relationships. The results of cell fluorescence imaging and CCK-8 experiments indicate that the sensor Por-RBO exhibits lower cytotoxicity. Por-RBO can be used for fluorescence distribution imaging of Hg 2+ in living cells.
研究领域:
分析化学
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生物医学工程
·
环境科学
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DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2019
·Vol. 21
·期 20
·10614-10620
·
IF 3.567
Zhaofan Yang,Guiqiang Pu,Xingming Ning,Yali Wu,Zhen Zhang,Duoliang Shan,Xiaoquan Lu
Low-potential electrochemiluminescence (ECL) luminophores with excellent ECL behavior have attracted considerable interest in biological analysis. Herein, we explored the ECL behavior of ZnTPP with different aggregates for the first time. In this work, we used the mixed solvent method to prepare the H- and J-aggregates of zinc tetraphenylporphyrin (ZnTPP). This resulted in a completely disparate morphology, such as nanoparticles and rod-aggregates, which were observed by recording atomic force microscopy (AFM) images. Characteristic changes in the optical properties and electrochemical properties of ZnTPP appeared when it underwent H- and J-aggregation. Significantly, the measured ECL behavior varied for the same ZnTPP molecules when they were in the form of H- and J-aggregates; and the ECL intensity of the J-aggregates was more than ten times that of the H-aggregates due to a narrower band gap and the formation advantages in J-aggregates. The narrower band gap of J-aggregates not only facilitates the electron–hole pair recombination, but also facilitates the electron injection into the J-aggregates. The formation advantage of the J-aggregates is likely to contribute to the strong ECL intensity of the J-aggregates. Maybe the big number of ZnTPP molecules in a J-aggregate unit increases the opportunity of generating excited states and light from excited state radiation. The ECL property could be regulated with the different aggregation of ZnTPP, which led to a decline of ECL cathode potential in the J-aggregates (191 mV) compared with the H-aggregates. This work provides an effective and novel strategy for developing ECL emitters with low potential and high ECL emission intensity via adjusting aggregation motifs.
研究领域:
材料科学
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电化学
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光学材料
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分析化学
·
纳米技术
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DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2013
·
IF 2.672
Xianghong Liu,Suozhu Wu,Bin Su
In this work we report the catalytic effect of 5,10,15,20-tetraphenylporphyrin (H 2 TPP) on the reduction of oxygen (O 2 ) by a weak electron donor, namely tetrathiafulvalene (TTF), at the polarized water/1,2-dichloroethane (DCE) interface. TTF alone, as reported previously, can reduce O 2 slowly via a four-electron transfer pathway to produce water. Herein we show that H 2 TPP can catalyze the reduction of O 2 by TTF to form hydrogen peroxide (H 2 O 2 ) at the water/DCE interface, which was investigated by voltammetry and biphasic shake-flask experiments. The overall process was found to be essentially a proton-coupled electron transfer reaction. And the results also proved that the catalytic activity of H 2 TPP toward O 2 reduction under acid condition arises from the polarization activation of O 2 by H 2 TPP diacid, namely H 4 TPP 2+ .
研究领域:
电化学
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催化化学
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界面化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2009
·Vol. 358
·期 2
·173-179
·
IF 3.19
Guan Huang,Shang-Yue Liu,Yong-An Guo,Ai-Ping Wang,Jin Luo,Chun-Cai Cai
The search for a reusable material as an efficient and economic catalyst for hydrocarbon oxidation is an important field of research. In this study, we investigated the highly effective combination of support and metalloporphyrin provided by manganese tetraphenylporphyrin adsorbed onto a precursor of freshly precipitated aluminium hydroxide, followed by conversion to a manganese porphyrin/boehmite compound. This was characterized using FT-IR, UV–vis spectroscopic techniques, N 2 BET analysis, X-ray powder diffraction, transmission electron micrograph technique and thermal analysis. Aerobic oxidation of cyclohexane has been investigated using the compound as a catalyst under mild conditions and in the absence of any solvent and reductant. The results indicate that it has higher catalytic activity than manganese tetraphenylporphyrin and the corresponding chitosan-supported catalyst. In particular, the catalyst exhibits good atom economy for cyclohexane oxidation, high catalyst turnover number, and good ketone and alcohol selectivity. In particular, it has excellent reusability, with no change in original catalytic activity; a quantity of catalyst containing only 1 mg of Mn TPP can be reused 8 times under the promotion of beomite (BM). In addition, we examined the reaction conditions for the use of such nanoparticle-supported manganese tetraphenylporphyrin as a mild and environmental friendly oxidation catalyst.
研究领域:
催化化学
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纳米材料
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绿色化学
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有机氧化反应
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多相催化
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 27
·15029-15039
·
IF 4.22
Wang Hongbo,Li Qian,Niu Xiaomeng,Du Jianxiu
A simple and feasible approach was constructed for preparation of all inorganic cesium lead bromide perovskite nanocrystals (CsPbBr 3 NCs) modified with tetraphenylporphyrin tetrasulfonic acid (TPPS). The CsPbBr 3 /TPPS nanocomposite has good water stability and exhibits a dual-emission property. Adopting the CsPbBr 3 /TPPS nanocomposite as a nanoprobe, a rapid, selective and sensitive ratiometric fluorescent method was developed for determination of sulfide ion. When sulfide ion was added into the CsPbBr 3 /TPPS nanocomposite, the bright green fluorescence of CsPbBr 3 NCs at 520 nm was sharply quenched, whereas the red fluorescence of TPPS at 650 nm was hardly influenced. The quenching is possibly attributed to destruction of CsPbBr 3 NCs via the formation of more stable PbS. This nanoprobe can determine sulfide ion over the range of 0.2–15.0 nmol·L −1 with a detection limit as low as 0.05 nmol·L −1 . The relative standard deviation is 3.3% at 10.0 nmol·L −1 concentration level ( n = 11). Sulfide ion content was successfully determined in different water samples by this nanoprobe. Graphical abstract
研究领域:
分析化学
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环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Zitao Yang,Chao Li,Jing Xu,Fangdi Wu,Kefan Zhang,Junhao Cai,Huaixiu Ye,Shuang Yang,Rongqi Zhang,Qing Wang,Yongnan Zhao
To enhance the energy density of MXene-based supercapacitors, metal porphyrin (MPP) is intercalated between the highly conductive two-dimensional (2D) MXene layers, thereby improving the electrochemical performance of MPP and preventing the restacking of MXene layers during the charge-discharge process of the supercapacitor. In this work, a cobalt tetraphenylporphyrin (CoTPP)/MXene nanocomposite is prepared through a simple π-π stacking self-assembly. The successful intercalation of CoTPP between the MXene layers was confirmed by SEM, TEM, XRD, XPS, and BET. Furthermore, Density functional theory (DFT) calculation results demonstrate that the interaction between CoTPP and MXene stabilizes the composite structure. MXene provides a conductive network for CoTPP, reducing the reaction energy barrier during the charge-discharge process and accelerating ion and electron transport. The symmetric all-solid-state supercapacitor based on the CoTPP/MXene composite exhibits an energy density of 12.7 Wh kg −1 and a power density of 320 W kg −1 , which demonstrates remarkable cycling stability, maintaining a capacity retention of 96.67 % even after 20000 cycles under a high current density of 5 A g −1 . This work presents a straightforward and effective approach for synthesizing CoTPP/MXene with superior electrical conductivity, exceptional chemical stability, and outstanding energy storage performance, making it a promising candidate for supercapacitor electrodes.
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产品关联
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2017
·Vol. 17
·期 6
·3880-3887
·
IF 1.483
Liu Xinmeng,Zhao Hongli,Gong Wenxiu,Zhang Zhengcheng,Lan Minbo,Zhao Xueling
In cancer diagnosis and treatment, it is significant to targetedly and efficiently deliver drugs to tumor cells. In our present work, a multifunctional drug delivery system (Fe3O4@mSiO2(TPPS)-PL), pullulan (PL) coated Fe3O4@mSiO2
core/shell nanoparticles with tetraphenylporphyrin tetrasulfonic acid hydrate (TPPS) as a model photodynamic drug, has been designed and prepared. The obtained Fe3O4@mSiO2(TPPS)-PL nanoparticles were discrete and uniformly sized with an average diameter
of 180 ± 10 nm. The cellular uptake of the Fe3O4@mSiO2(TPPS)-PL nanoparticles against HepG2 cells and HeLa cells were evaluated by flow cytometry and confocal scanning laser microscopy (CLSM), respectively. The results indicated that the cellular
uptake of the nanoparticles by HepG2 cells was more than that by HeLa cells due to that HepG2 cells express maximum asialoglycoprotein receptor (ASGPR), and the uptake process was time-dependent. Additionally, the phototoxicity of Fe3O4@mSiO2(TPPS)-PL
nanoparticles against HepG2 cells was investigated by MTT assay, and the materials exhibited efficient phototoxicity. It was suggested that the multifunctional drug delivery system is capable of targeting specific receptors, which is promising for photodynamic therapy (PDT).
研究领域:
癌症研究
·
纳米技术
·
药学科学
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生物医学工程
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Shenhao Wang,Qing Huang
Ni(II) meso-tetraphenylporphyrin (NiTPP) is a model molecule whose substituent causes out-of-plane (oop) deformations of the porphyrin macrocycle. Although the conformers of NiTPP in the solution had been tentatively explored, the determination of its specific conformers was controversial. In this work, based on the conformational search through molecular dynamics (MD), three energy lowest-lying conformers of NiTPP were sorted out, namely, the S 4 (staggered) conformer, the C 2 (eclipsed) conformer, and the C 1 (eclipsed-staggered) conformer. According to the high-precision free energy calculation based on density functional theory (DFT), the Raman and 1 H-NMR spectra of the three conformers were calculated. The actual spectra of NiTPP in solution resulted from the sum spectra of the mixture conformers, so with the consideration of the corresponding conformation weights, the experimental spectra could be stimulated. Our results showed that only at the low-frequency ∼215 cm −1 , did the Raman spectrum in solution differ significantly from that in solid powder. On the other hand, the 1 H-NMR spectra of the NiTPP conformers were remarkably different, and none of the single conformer's 1 H-NMR range could match the experimental 1 H-NMR spectrum. However, with the consideration of the existence of three dominant conformations, the observed 1 H-NMR spectrum could be well simulated, confirming the rational mixture of the three dominant conformers existing in the aqueous solution. Therefore, this work has not only resolved the different conformers of NiTPP in solution, but also provided an effective approach to combining DFT, Raman, and 1 H-NMR analytical tools for identifying different oop conformations of metalloporphyrins in solution.
研究领域:
化学
·
光谱学
·
理论计算
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Wenshuo Wang,Pengju Pan,Yongzhong Bao
To meet improved requirements for proton-exchange membranes (PEMs) applied in medium- and low-temperature fuel cells, novel PEMs with superior performance are prepared by using commercial perfluorinated sulfonic-acid ionomer (PFSA) and a dopant, tetraphenylporphyrin tetrasulfonic-acid (TPPS). Different from physically blending PFSA with another polymer or a nano-material, the membrane-forming mechanism of TPPS modified PFSA PEMs is highly dependent on the efficient interaction between PFSA and TPPS molecules. The unique three-part nested hydrophilic-hydrophobic-hydrophilic molecular structure of TPPS plays a crucial role in the co-assembly of PFSA with TPPS. The more intensive ionic cross-linking and hydrogen-bond networks are formed through hydrophilic groups in the outer and internal parts of TPPS and sulfonic-acid groups of PFSA. Meanwhile, secondary cross-linking of these hydrophilic groups is induced by rigid hydrophobic groups in the middle part of TPPS. Therefore, these molecular interactions induce the formation of more stable and stronger nano-phase separation with more uniform size. This novel nano-phase separation structure endows PEMs with elevated applicable temperatures, much increased proton conductivity and thus superior fuel cell performances, which are the keys to the development of more advanced hydrogen fuel cells.
研究领域:
材料科学
·
燃料电池技术
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Chunlin Li,Qinbo Wang,Binwei Shen,Zhenhua Xiong,Chuxiong Chen
The mole fraction solubilities of 5,10,15,20-tetraphenylporphyrin (TPP) and 5,10,15,20-tetra(p-chlorophenyl)porphyrin (p-ClTPP) in binary system N,N-dimethylformamide (DMF) + water solvent mixtures were measured at atmospheric pressure by using the static method. The temperature and effects of mole fraction of DMF in the solvent mixtures on solubility were studied. The results show that the solubilities of TPP and p-ClTPP increase with the increasing temperature for a certain solvent composition, and the solubilities show a maximum in pure DMF, then the solubilities decrease when the water was added to the system. The experimental data were correlated with modified Apelblat equation. The solubilities calculated by the model were in good agreement with experimental observations. Thermodynamic parameters such as dissolution enthalpy, isobaric heat capacity and Gibbs energy were obtained from the solubility data by using the Clark–Glew equation together with the modified Apelblat equation. The result demonstrated that the dissolving process of TPP and p-ClTPP in DMF + water solvent mixtures is endothermic and not spontaneous.
研究领域:
化学
·
物理化学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL PHYSICS
·
2023
·Vol. 36
·期 1
·57-65
·
IF 1
Wang Shen-hao,Muhammad Muhammad,Huang Qing
It is important to identify non-planar deformations of porphyrin macrocycle in metallo-porphyrin proteins due to their functional relevance. The relationship between non-planar deformations of porphyrin macrocycle and low frequency Raman spectral bands of Ni(II) meso-tetraphenyl porphyrin (NiTPP), with different coordination numbers, was studied by density functional theory (DFT), normal coordinate structural decomposition method and Raman experiments. The results show that the crystal of four-coordinate NiTPP has two major kinds of non-planar deformations: ruffling and saddling. The non-planar deformations of ruffling and saddling for NiTPP are 1.473 Å and 0.493 Å determined by DFT calculation. The ruffling and saddling deformations can be identified by using the low frequency Raman characteristic peaks ( γ 12 , γ 13 ) and ( γ 16 , γ 17 ), respectively. When four-coordinate NiTPP is transformed to the six-coordinate bis(pyrrolidine) NiTPP (NiTPP(Pyr) 2 ), the large non-planar distortion of the porphyrin macrocycle almost disappears, with the non-planar deformation of saddling only about 0.213 Å estimated by DFT calculation. Experimentally, we can make use of the characteristic peaks of low frequency Raman spectra to identify the saddling deformation beyond 0.25 Å.
研究领域:
生物化学
·
材料科学
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DOI
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
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