Transition metal complexes of meso-tetra(4-myristyloxyphenyl)porphyrin TMPPM [M =Mn, Fe, Co, Ni, Cu, Zn; TMPP=mesotetra(4-myristyloxyphenyl)porphyrin] have been synthesized and characterized by means of elemental an...Transition metal complexes of meso-tetra(4-myristyloxyphenyl)porphyrin TMPPM [M =Mn, Fe, Co, Ni, Cu, Zn; TMPP=mesotetra(4-myristyloxyphenyl)porphyrin] have been synthesized and characterized by means of elemental analyses, UV-Vis spectra, infrared photoacoustic spectra, 1H NMR spectra, molar conductance and differential scanning calorimetry(DSC). The ligand and the Zn complex show liquid crystalline behavior. According to the DSC thermogram of the Zn complex, it exhibits a lower phase transition temperature -7.453 ℃ and a wide mesophase temperature span, 77 ℃.展开更多
Complex of meso-tetra-(1-naphthyl)tetrabenzo-porphyrin with holmium acetylacetonate,Ho(TNTBP)acac(TNTBP:meso-tetra-(1-naphthyl) tetrabenzoporphyrin.Hacac:acetylacetone)have been prepared and char- acterized by element...Complex of meso-tetra-(1-naphthyl)tetrabenzo-porphyrin with holmium acetylacetonate,Ho(TNTBP)acac(TNTBP:meso-tetra-(1-naphthyl) tetrabenzoporphyrin.Hacac:acetylacetone)have been prepared and char- acterized by elemental analyses,ultra-violet visible spectra and in- frared spectra.展开更多
In this paper meso-tetra (4-methoxyphenyl-3-sulpho) Porphine (TMPPS_4) was synthesized and its colour reaction with copper was studied. It was found to be a highly sensitive and highly selective reagent for the direct...In this paper meso-tetra (4-methoxyphenyl-3-sulpho) Porphine (TMPPS_4) was synthesized and its colour reaction with copper was studied. It was found to be a highly sensitive and highly selective reagent for the direct spectrophotometric determination of ultramicro amount of copper. The apparent molar absorptivity of the complex is 3.72×10~5L/mol·cm. Beer's law is obeyed for Cu(Ⅱ)of 0～1.4μg/10ml. The interference of 21 different ions and 6 kinds of salts were examined and found to be minimal. The complex formation of Cu(Ⅱ) with TMPPS_4 is generally slow at room temperature<<25℃>, but the reaction can be accelerated in the presence of NH_2OH·>HCl and completed within 5min. At PH 5.2 the Soret band of TMPPS_4 overlaps almost completetely with that of the complex. Therefore, the complex formation is taken to completion at this PH. Then the Soret band of TMPPS_4 shifted away from that of the complex by acidification. This simple and rapid method has been successfully applied to the direct determination of Cu in Al-alloys, industrial water, foods and human hair.展开更多
Synthesis of a new high sensitive water soluble chromogenic reagent mes o tetra (2 chloro 4 sulfophenyl)prophyrin and the conditions for the reaction of this reagent with cadmiun(Ⅱ) were studied. The apparent...Synthesis of a new high sensitive water soluble chromogenic reagent mes o tetra (2 chloro 4 sulfophenyl)prophyrin and the conditions for the reaction of this reagent with cadmiun(Ⅱ) were studied. The apparent molar absorption coefficient at 434 nm is 5.20×10 5 L·mol -1 ·cm -1 . The method has been applied to the determination of 5.0×10 -9 (content by weight) Cadmium(Ⅱ) in honey.展开更多
Though there are numerous intrinsic merits of metal-organic frameworks(MOFs),low charge separation efficiency has imposed heavy restrictions on their photocatalytic application.Herein,in situ porphyrin ligand substitu...Though there are numerous intrinsic merits of metal-organic frameworks(MOFs),low charge separation efficiency has imposed heavy restrictions on their photocatalytic application.Herein,in situ porphyrin ligand substitution,as a strategy for improving the charge separation efficiency and increasing the amounts of active sites,has been designed and realized in a Hf-biphenyl dicarboxylic acid(BPDC)MOF.Specifically,a size and geometry matched meso-tetra(4-carboxyphenyl)porphyrin(TCPP)ligand was selected and doped into Hf-BPDC MOF by forming coordinating bonds with Hf centers,forming dualligand Hf-BPDC-TCPP MOF.The resultant Hf-BPDC-TCPP MOF showed significantly improved activity and chemical stability in the photocatalytic H_(2)generation(261μmol·g^(-1)·h^(-1))and tetracycline(TC)degradation reactions(95.8%),which was 48 and 1.47 folds higher than that of the Hf-BPDC MOF.Photophysical and electrochemical studies revealed that the introduction of porphyrin ligand could generate a stronger internal electric field for boosting the charge separation and transfer,increase the specific surface area for providing more active sites,and narrow the band gap to enhance the visible light absorption.This in situ ligand substitution method provides a promising approach to build a tunable platform for constructing high-performance MOF photocatalysts.展开更多
文摘Transition metal complexes of meso-tetra(4-myristyloxyphenyl)porphyrin TMPPM [M =Mn, Fe, Co, Ni, Cu, Zn; TMPP=mesotetra(4-myristyloxyphenyl)porphyrin] have been synthesized and characterized by means of elemental analyses, UV-Vis spectra, infrared photoacoustic spectra, 1H NMR spectra, molar conductance and differential scanning calorimetry(DSC). The ligand and the Zn complex show liquid crystalline behavior. According to the DSC thermogram of the Zn complex, it exhibits a lower phase transition temperature -7.453 ℃ and a wide mesophase temperature span, 77 ℃.
文摘Complex of meso-tetra-(1-naphthyl)tetrabenzo-porphyrin with holmium acetylacetonate,Ho(TNTBP)acac(TNTBP:meso-tetra-(1-naphthyl) tetrabenzoporphyrin.Hacac:acetylacetone)have been prepared and char- acterized by elemental analyses,ultra-violet visible spectra and in- frared spectra.
文摘In this paper meso-tetra (4-methoxyphenyl-3-sulpho) Porphine (TMPPS_4) was synthesized and its colour reaction with copper was studied. It was found to be a highly sensitive and highly selective reagent for the direct spectrophotometric determination of ultramicro amount of copper. The apparent molar absorptivity of the complex is 3.72×10~5L/mol·cm. Beer's law is obeyed for Cu(Ⅱ)of 0～1.4μg/10ml. The interference of 21 different ions and 6 kinds of salts were examined and found to be minimal. The complex formation of Cu(Ⅱ) with TMPPS_4 is generally slow at room temperature<<25℃>, but the reaction can be accelerated in the presence of NH_2OH·>HCl and completed within 5min. At PH 5.2 the Soret band of TMPPS_4 overlaps almost completetely with that of the complex. Therefore, the complex formation is taken to completion at this PH. Then the Soret band of TMPPS_4 shifted away from that of the complex by acidification. This simple and rapid method has been successfully applied to the direct determination of Cu in Al-alloys, industrial water, foods and human hair.
文摘Synthesis of a new high sensitive water soluble chromogenic reagent mes o tetra (2 chloro 4 sulfophenyl)prophyrin and the conditions for the reaction of this reagent with cadmiun(Ⅱ) were studied. The apparent molar absorption coefficient at 434 nm is 5.20×10 5 L·mol -1 ·cm -1 . The method has been applied to the determination of 5.0×10 -9 (content by weight) Cadmium(Ⅱ) in honey.
基金financially supported by the National Nature Science Foundation of China(Nos.22102064 and 21972058)supported by the Open Project Program of Fujian Provincial Key Laboratory of Ecology-Toxicological Effects and Control for Emerging Contaminants,Putian University。
文摘Though there are numerous intrinsic merits of metal-organic frameworks(MOFs),low charge separation efficiency has imposed heavy restrictions on their photocatalytic application.Herein,in situ porphyrin ligand substitution,as a strategy for improving the charge separation efficiency and increasing the amounts of active sites,has been designed and realized in a Hf-biphenyl dicarboxylic acid(BPDC)MOF.Specifically,a size and geometry matched meso-tetra(4-carboxyphenyl)porphyrin(TCPP)ligand was selected and doped into Hf-BPDC MOF by forming coordinating bonds with Hf centers,forming dualligand Hf-BPDC-TCPP MOF.The resultant Hf-BPDC-TCPP MOF showed significantly improved activity and chemical stability in the photocatalytic H_(2)generation(261μmol·g^(-1)·h^(-1))and tetracycline(TC)degradation reactions(95.8%),which was 48 and 1.47 folds higher than that of the Hf-BPDC MOF.Photophysical and electrochemical studies revealed that the introduction of porphyrin ligand could generate a stronger internal electric field for boosting the charge separation and transfer,increase the specific surface area for providing more active sites,and narrow the band gap to enhance the visible light absorption.This in situ ligand substitution method provides a promising approach to build a tunable platform for constructing high-performance MOF photocatalysts.
