Developments in tellurium containing macrocycles

Panda, Arunashree

doi:10.1016/j.ccr.2009.03.025

Cited by 41 publications

(6 citation statements)

References 63 publications

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“…Tellurium-containing porphyrinoids such as 5,10,15,20-tetraphenyl-21-telluraporphyrin have unusual properties and reactivity when compared to their lighter chalcogen analogues . For example, it was shown that the inner tellurium atom can be removed from the parent 21-telluraporphyrin without changing the integrity of the porphyrin skeleton.…”

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confidence: 99%

Synthesis of Tellurabenziporphyrin and Its Pd(II) Complex

2018

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An unprecedented tellurabenziporphyrin containing C, N, and Te donor atoms was synthesized by condensing benzitripyrrane and tellurophene diol under acid catalyzed conditions. The tellurabenziporphyrin readily forms a Pd(II) complex when treated with PdCl in CHCl/CHCN. The crystal structures of tellurabenziporphyrin and its Pd(II) complex revealed that the benzene ring hinders the π-electron delocalization. An unusual five-membered ring formed inside the macrocycle due to the strong interaction between "Te" and "N" in the Pd(II) complex.

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confidence: 99%

Synthesis of Tellurabenziporphyrin and Its Pd(II) Complex

2018

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“…[8] The telluraporphyrinoids are air sensitive and prone to undergo oxidation reactions and thus relatively difficult to handle compared to other chalcogen containing porphyrinoids. [9,10] Although extensive literature available on O, S and Se containing porphyrinoids, [11][12][13][14] the chemistry of Te containing porphyrinoids is remained limited due to inaccessibility of suitable precursors and inherent instability associated with Te containing porphyrinoids. For example, several multiporphyrin arrays containing oxa-and thiaporphyrins have been reported [15][16][17][18] but to the best of our knowledge, there is no report on telluraporphyrinoid containing multiporphyrin arrays.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Studies of Mono‐functionalized Telluradithiasapphyrins and Covalently Linked Porphyrin‐ Telluradithiasapphyrin Dyads

Ali

Ravikanth

2023

Chemistry An Asian Journal

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A series of mono‐functionalized aromatic 22π telluradithiasapphyrins containing functional groups such as p‐bromophenyl, p‐iodophenyl, p‐nitrophenyl and p‐trimethylsilylethynyl phenyl groups at one of the meso‐positions were synthesized by condensing appropriately functionalized unsymmetrical bithiophene diol and 16‐telluratripyrrane in CH2Cl2 under acid‐catalyzed conditions. To demonstrate the reactivity of mono‐functionalized telluradithiasapphyrins, we synthesized the first examples of covalently linked diphenyl ethyne bridged four novel 18π porphyrin/metalloporphrin‐22π telluradithiasapphyrin dyads by coupling meso‐ethynyl phenyl porphyrin with telluradithiasapphyrin containing meso‐iodophenyl group under Pd(0) coupling conditions followed by metalation of porphyrin unit by treating free base dyad with appropriate metal salts. The dyads were characterized and studied by mass, 1D & 2D NMR, absorption, cyclic voltammetry, fluorescence and DFT techniques. The DFT analysis showed that the porphyrin/metalloporphyrin and sapphyrin units in dyads orient with each other in different angles and Zn(II) porphyrin‐sapphyrin dyad (Zn‐dyad) showed minimum whereas the free base dyad showed maximum angle of deviation. NMR, absorption, and redox studies indicated that the dyads exhibit the overlapping features of their constituted monomers and maintain their individual characteristic features. The steady‐state fluorescence studies revealed that the fluorescence of the porphyrin/metalloporphyrin unit was significantly quenched due to possible energy/electron transfer from the porphyrin/metalloporphyrin unit to non‐emissive sapphyrin unit in dyads.

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“…6H 2 O metal precursors, monometallic complexes were obtained. [26][27][28][29] However, in the case of HgCl 2 or Pt(COD)Cl 2 [COD = 1,5 cyclooctadiene] metal precursors, the CÀ Te bond cleavages have taken place. [26][27][28][29] On the other hand, the reduced form of hybrid telluroether III involved in straightforward ligation process with Pd(II) precursors.…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28][29] However, in the case of HgCl 2 or Pt(COD)Cl 2 [COD = 1,5 cyclooctadiene] metal precursors, the CÀ Te bond cleavages have taken place. [26][27][28][29] On the other hand, the reduced form of hybrid telluroether III involved in straightforward ligation process with Pd(II) precursors. Similarly, acyclic telluroethers IV, V also underwent CÀ Te bond cleavage upon reaction with Hg(II) and Pd(II) metal salts, whereas the diazene telluroether VI afforded a cleaved product VII.…”

Section: Introductionmentioning

confidence: 99%

“…[25] Our group has reported 22-membered macrocyclic hybrid telluroethers II and III with azamethine/amine chelating sites and explored the coordination properties. [26][27][28] It is interesting to note that, when telluroether II was treated with Pd-(C 6 H 5 CN)Cl 2 , and NiCl 2 . 6H 2 O metal precursors, monometallic complexes were obtained.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Quinoline Telluroether Ligand Derived Copper and Silver Complexes: Synthesis, Structural and Electronic Properties

2022

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The tetradentate organotelluroether (C 9 H 6 NTe) 2 CH 2 ligand has been synthesized and its coordination behaviour with a stoichiometric amount of copper(II) and silver(I) perchlorate and triflate salts has been experimentally investigated. The isolated ligand and metal complexes are characterized by multinuclear ( 1 H, 13 C, 125 Te) NMR spectroscopy, single crystal X-ray diffraction, and DFT calculations. The X-ray analysis revealed the formation of self-assembled bimetallic complexes with the molecular formula of 2[M(C

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Developments in tellurium containing macrocycles

Cited by 41 publications

References 63 publications

Synthesis of Tellurabenziporphyrin and Its Pd(II) Complex

Synthesis of Tellurabenziporphyrin and Its Pd(II) Complex

Synthesis and Studies of Mono‐functionalized Telluradithiasapphyrins and Covalently Linked Porphyrin‐ Telluradithiasapphyrin Dyads

Hybrid Quinoline Telluroether Ligand Derived Copper and Silver Complexes: Synthesis, Structural and Electronic Properties

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