120644-25-9Relevant academic research and scientific papers
Synthesis and structural, photophysical, electrochemical redox and axial ligation properties of highly electron deficient perchlorometalloporphyrins and selective CN- sensing by Co(ii) complexes
Chaudhri, Nivedita,Butcher, Ray J.,Sankar, Muniappan
, p. 8190 - 8199 (2018)
A straightforward synthetic route has been adopted to synthesize highly nonplanar electron deficient perchlorometallo-porphyrins. Herein, we report the synthesis and characterization of MTPP(NO2)Cl7 where M = CoII, NiII, CuII and ZnII. Further, we examined their optical and electrochemical redox properties and the results are compared with MTPPCl8. MTPP(NO2)Cl7 exhibited red-shifted (~10-15 nm) absorption spectra relative to MTPPCl8 due to the strong electron withdrawing nature of the nitro group. Mixed β-substitution alters the electrochemical redox properties to such an extent that an appreciable increase in the anodic shift in reduction potential (200-300 mV) is observed for MTPP(NO2)Cl7 relative to MTPPCl8 whereas only a minimal shift (15-50 mV) in the oxidation potential is observed. Nonplanarity of the macrocyclic core was investigated by single crystal X-ray analysis and DFT calculations. A higher ΔCβ (0.706 ?) for 1d as compared to 2d (0.642 ?) undoubtedly signifies nonplanarity induced by the nitro group. To substantiate the effect of mixed substitution, we performed axial ligation studies of Zn(ii) complexes with nitrogenous bases and basic anions and found higher log:β2 values as well as a linear relation between log:β2 and pKa as compared to perbromoporphyrins. Highly electron deficient β-substituted Co(ii) porphyrins (1a and 2a) were utilized as novel sensors for selective rapid visual detection of CN- ions.
Effect of degree of β-chlorination on photocatalytic activity of meso-tetraphenylporphyrin under homogeneous and nanoscale heterogeneous conditions: Chlorination vs. bromination
Alghooneh, Leila,Heydari-turkmani, Akram,Yavari, Hadi,Zakavi, Saeed
, p. 84 - 94 (2020)
β-Chlorination of meso-tetraphenylporphyrin, H2TPP leads to the formation of H2TPPClx (X = 2, 4, 6 and 8) with absorption bands in the range of 421–451 and 650–715 nm, for the Soret and Q(0,0) bands, respectively. H2
Colorimetric "naked eye" detection of CN-, F-, CH3COO- and H2PO4- ions by highly nonplanar electron deficient perhaloporphyrins
Chaudhri, Nivedita,Sankar, Muniappan
, p. 3269 - 3275 (2015/02/19)
Highly nonplanar perhaloporphyrin-based receptors have been synthesized and characterized by various spectroscopic techniques. Nonplanar and electron deficient nature was authenticated by electronic spectral, electrochemical redox and protonation-deproton
Partial and full β-chlorination of meso-tetraphenylporphyrin: effects on the catalytic activity of the manganese complexes for oxidation of organic compounds with periodate
Rayati, Saeed,Bohloulbandi, Elaheh,Zakavi, Saeed,Jafarian, Majid,Rashvand Avei, Mehdi
, p. 997 - 1003 (2015/03/18)
A series of β-chlorinated meso-tetraphenylporphyrins, H2TPPCIx (x = 2, 4, 6, or 8) have been prepared and the catalytic activity of their manganese(III) complexes in oxidation of cyclooctene, cyclohexene, and methyl phenyl sulfide wi
First X-ray crystal structure of a lanthanide(III) monoporphyrinic complex using non-planar porphyrin rings
Spyroulias, Georgios A.,Despotopoulos, Alexis,Raptopoulou, Catherine P.,Terzis, Aris,Coutsolelos, Athanassios G.
, p. 783 - 784 (2007/10/03)
Twenty-three years after the first synthesis of lanthanide(III) porphyrins the X-ray crystal structure of [TbIII(β-Cl8tpp)(O2CMe)(Me 2SO2] is reported; the synthetic route to four halogenated porphyrins H2(β-Xntpp) (X = Cl or Br, n = 4 or 8) is described and compared with the corresponding [TbIII(β-Xntpp)(O2CMe)]; the highly distorted structure of the TbIII complex is compared with similar perhalogenated porphyrinic complexes; the X-ray structure of the brominated free base is also reported.
METAL-ASSISTED REACTIONS. PART 22. SYNTHESIS OF PERHALOGENATED PORPHYRINS AND THEIR USE AS OXIDATION CATALYSTS
Gonsalves, Antonio M. d'A. Rocha,Johnstone, Robert A. W.,Pereira, Mariette M.,Shaw, Jaqueline,Sobral, Abilio J. F. do N.
, p. 1355 - 1358 (2007/10/02)
Meso-tetrakisarylporphyrins have been perchlorinated and perbrominated at peripheral (β)-positions of the pyrrole rings by high-yielding procedures.These halogenated porphyrins show enhanced catalytic activity towards oxidation of alkanes and alkenes but
