Rhenium(I) bridged porphyrin dyads with heteroatom substituted cores: Synthesis and fluorescence properties

Santosh, G.; Ravikanth, Mangalampalli

doi:10.1016/j.ica.2005.03.032

Cited by 17 publications

(13 citation statements)

References 64 publications

(17 reference statements)

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“…Santosh and Ravikanth used the same strategy 16 to synthesize porphyrin dyads containing two free base heteroporphyrin subunits. Heteroporphyrins or coremodified porphyrins resulted from the replacement of one or two inner nitrogen atoms with heteroatoms such as O, S, Se and Te possess interesting electronic and photophysical properties.…”

Section: Re(i) Bridged Porphyrin Dyadsmentioning

confidence: 99%

“…17,18 Since covalently linked porphyrin arrays involves multi-step synthesis and laborious column chromatographic purifications, we adopted non-covalent strategies to synthesize multiporphyrin arrays to study energy transfer at singlet state. 16 We prepared Re(I) bridged two homo dyads such as 7 containing two N 3 O porphyrin subunits and 8 containing two N 3 S porphyrin subunits and one hetero dyad 9 containing one N 3 O porphyrin and N 3 S porphyrin subunits as shown in chart 3. The dyads 7-9 were prepared in one flask by treating 0.5 equivalent of 5,10-diphenyl-15,20-di(4-pyridyl)-21-oxaporphyrin (cis-N 3 ODPyP) and 5,10-bis(4-octyloxyphenyl)-15,20-bis(4-pyridyl)-21-thiaporphyrin (cis-N 3 SDPyP) with 1 equivalent of Re(CO) 5 Cl in THF at refluxing temperature for 12 h (scheme 3).…”

Section: Re(i) Bridged Porphyrin Dyadsmentioning

confidence: 99%

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Re(I) bridged porphyrin dyads, triads and tetrads

Yedukondalu

Ravikanth

2011

J Chem Sci

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Porphyrin rings containing two meso-pyridyl groups either in cis or trans fashion can be used to construct Re(I) bridged multiporphyrin assemblies. The cis-dipyridyl porphyrins with various porphyrin cores such as N 4 , N 3 O, N 3 S, N 2 S 2 have been used to react with Re(CO) 5 Cl in THF at refluxing temperature and constructed planar Re(I) bridged porphyrin dyads containing either one type of porphyrin subunit or two types of porphyrin subunits. The trans-dipyridyl porphyrins have been used to construct Re(I) bridged porphyrin squares. The porphyrin dyads have been explored for singlet-singlet energy transfer studies and porphyrin squares have been used for catalysis, chemical sensing, molecular sieving and photocurrent production studies. An overview of synthesis of Re(I) bridged porphyrin dyads, triads and tetrads and their interesting photophysical properties are highlighted in this paper.

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Section: Re(i) Bridged Porphyrin Dyadsmentioning

confidence: 99%

Section: Re(i) Bridged Porphyrin Dyadsmentioning

confidence: 99%

Re(I) bridged porphyrin dyads, triads and tetrads

Yedukondalu

Ravikanth

2011

J Chem Sci

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“…XV). 48 The reaction resulted in the formation of mixture of three dyads and the required unsymmetrical porphyrin dyad 131 was separated from the other two homodyads 132 and 133 by column chromatography. The formation of Re(I) bridged dyad 131 was confirmed by the downfield shifts of meso-pyridyl protons.…”

Section: Non-covalently Linked Unsymmetrical Porphyrin Dyadsmentioning

confidence: 99%

Mono‐functionalized Heteroporphyrin Building Blocks and Unsymmetrical Covalent and Non‐covalent Porphyrin Dyads

Yedukondalu

Ravikanth

2011

J Chinese Chemical Soc

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Heteroporphyrins resulted from the replacement of one or two pyrrolic nitrogens with other hetero atoms such as O, S, Se and Te possess very interesting and distinct properties compared to tetrapyrrolic porphyrins. Specially, the singlet state energy levels can be fine tuned with suitable modification of porphyrin core by substituting pyrrolic "N" with other hetero atoms such as "O" and "S". In this review, we describe our synthetic approaches for the synthesis of various mono-functionalized heteroporphyrin building blocks and their use in the synthesis of several covalently and non-covalently linked unsymmetrical porphyrin dyads containing two different porphyrin sub-units. The photophysical studies are also described to show the possibility of singlet-singlet energy transfer from one porphyrin sub-unit to another in these unsymmetrical porphyrin dyads.

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“…Another potentially attractive extension (not yet reported) would be incorporation of tetrapyridyl porphyrin repeat units as suggested in structure 9. An extension that has been reported is dimer and hetero dimer formation from sulfur and oxygen substituted porphyrins; see compounds 10-12 [20].…”

Section: Methodsmentioning

confidence: 86%

Rhenium‐Linked Multiporphyrin Assemblies — Synthesis and Properties

Hupp

2007

ChemInform

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Re(CO) 5 Cl readily reacts with pyridine-derivatized porphyrins to give molecular squares or planar dimers featuring fac-Re(CO) 3 (Cl) corners. Chelating ligands, in sequential combination with pyridine-derivatized porphyrins, can be used to obtain related cofacial porphyrin assemblies. Films and membranes displaying molecular-scale porosity can be generated from squares by: (1) van der Waals aggregation, (2) layer-bylayer assembly chemistry based on zirconium-phosphonate links, or (3) polymerization at liquid-liquid interfaces. In addition to molecular sieving, films, membranes, and free assemblies have been used for chemical sensing, oxidative catalysis, and light-to-electrical energy conversion. The assemblies have also been used to investigate fundamental aspects of light-induced energy and electron transfer.

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Rhenium(I) bridged porphyrin dyads with heteroatom substituted cores: Synthesis and fluorescence properties

Cited by 17 publications

References 64 publications

Re(I) bridged porphyrin dyads, triads and tetrads

Re(I) bridged porphyrin dyads, triads and tetrads

Mono‐functionalized Heteroporphyrin Building Blocks and Unsymmetrical Covalent and Non‐covalent Porphyrin Dyads

Rhenium‐Linked Multiporphyrin Assemblies — Synthesis and Properties

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