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Xu F, Zhang D, Lu Q, Zhang R, Xia J. Rational design of fluorescent chemosensor for Pd 2+ based on the formation of cyclopalladated complex. Talanta 2023; 253:123967. [PMID: 36195028 DOI: 10.1016/j.talanta.2022.123967] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/19/2022] [Accepted: 09/22/2022] [Indexed: 12/13/2022]
Abstract
According to the assumption that the formation of C-Pd bond becomes a cyclopalladated complex (CPC), we designed and synthesized two C-N-N pincer ligands of BODIPY appended 2,2'-bipyridine derivatives (BP and BPB). It has been confirmed that the C-Pd bond does exist and plays a crucial role in "on-off" fluorescence behavior. Based on it, a coordination-induced fluorescence quenching sensor for Pd2+ was constructed. The results indicated that BP possessed high sensitivity and specificity for Pd2+ in solution. The limit of detection (LOD) of BP is determined to be 0.97 nM within a linear range between 1.0 and 50.0 nM, meanwhile, the platinum-group ions demonstrate no interference. The bio-imaging application of BP was investigated and it exhibited a promising vitro test for fluorescent imaging of Pd2+ ions in MCF-7 cells. Meanwhile, BPB coated sensor label for Pd2+ was set up. The visible color variation was displayed under UV light with increasing concentrations of Pd2+. Briefly speaking, fluorescence probes of BP and BPB offer new approaches for Pd2+ detection in a lab and on-site test, as well as the vivo imaging. Then, with the aid of (TD)DFT calculation, the internal reason for the optical difference between the two ligands was disclosed. This concept of CPC containing a Pd-C covalent bond provides a promising perspective of coordination fluorescence sensors.
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Affiliation(s)
- Feng Xu
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Dongkui Zhang
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Qingyi Lu
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, China
| | - Rui Zhang
- School of Chemical Engineering and Pharmacy, Wuhan Instituted and Technology, Wuhan, 400073, Hubei, China
| | - Jiangbin Xia
- Hubei Key Lab on Organic and Polymeric Optoelectronic Materials, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, Hubei, China; Engineering Research Center of Organosilicon Compounds & Materials, Ministry of Education, College of Chemistry and Molecular Science, Wuhan University, Wuhan, 430072, Hubei, China.
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Pushpanandan P, Ravikanth M. Synthesis and Properties of Stable 20π Porphyrinoids. CHEM REC 2022; 22:e202200144. [PMID: 35896952 DOI: 10.1002/tcr.202200144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/01/2022] [Indexed: 11/09/2022]
Abstract
The 20π porphyrinoids are immediate higher homologues of 18π porphyrins and differ from porphyrins in aromaticity which in turn affects the structure, properties and chemical reactivities. Research over the years indicated that the 20π porphyrinoids can be stabilized as non-aromatic/anti-aromatic or Mobius aromatic macrocycles using different strategies such as core-modification of porphyrins, non-metal/metal complexation of porphyrins, peripheral modification of porphyrins and expanded porphyrinoids. The structural properties such as aromaticity of the macrocycle can be controlled by choosing the right synthetic strategy. This review will provide an overview of the development in the chemistry of 20π porphyrinoids giving emphasize on the synthesis, structure and electronic properties of these macrocycles which have huge potential for various applications.
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Affiliation(s)
- Poornenth Pushpanandan
- Department of Chemistry, Indian Institute of Technology Bombay, Macrocyclic Lab, Lab No. 338, 400076, Mumbai, India
| | - Mangalampalli Ravikanth
- Department of Chemistry, Indian Institute of Technology Bombay, Macrocyclic Lab, Lab No. 338, 400076, Mumbai, India
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Sengupta R, Tiwari S, Ravikanth M. Synthesis and properties of covalently linked di-p-benzihomoporphyrin-BODIPY conjugates. J PORPHYR PHTHALOCYA 2021. [DOI: 10.1142/s1088424621501108] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Two mono meso-functionalized [20]di-[Formula: see text]-benzihomoporphyrins containing [Formula: see text]-formylphenyl and [Formula: see text]-iodophenyl groups at meso-position respectively were synthesized by condensing one equivalent of appropriate tetrapyrrane with one equivalent of [Formula: see text]-formyl benzaldehyde/[Formula: see text]-iodo benzaldehyde in CH2Cl2 under mild acid catalyzed conditions. The meso-formylphenyl and meso-iodophenyl functionalized di-[Formula: see text]-benzihomoporphyrins were used to synthesize two covalently linked di-[Formula: see text]-benzihomoporphyrins-BODIPY conjugates. The meso-formylphenyl-functionalized di-[Formula: see text]-benzihomoporphyrin was converted to corresponding meso-dipyrrolyl substituted di-[Formula: see text]-benzihomoporphyrin by treating with excess pyrrole under acid catalyzed conditions. In the next step, the meso-dipyrrolyl di-[Formula: see text]-benzihomoporphyrin was subjected to oxidation followed by BF2 complexation to afford the directly linked di-[Formula: see text]-benzihomoporphyrin-BODIPY conjugate. The meso-iodophenyl functionalized di-[Formula: see text]-benzihomoporphyrin was coupled with ethynyl-functionalized BODIPY under mild Pd(0) coupling condition to synthesize diphenylethyne-bridged di-[Formula: see text]-benzihomoporphyrin-BODIPY conjugate. The two conjugates were characterized by HR-MS, NMR, absorption, electrochemical, fluorescence and DFT studies. The spectral and electrochemical studies indicated that the two constituents, di-[Formula: see text]-benzihomoporphyrin and BODIPY units in the conjugates interact weakly and retain their individual characteristic features. DFT studies indicated a possibility of charge transfer between di-[Formula: see text]-benzihomoporphyrin and BODIPY units in conjugates.
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Affiliation(s)
- Rima Sengupta
- Department of Chemistry, IIT Bombay, Powai, Mumbai. India
| | - Shubham Tiwari
- Department of Chemistry, IIT Bombay, Powai, Mumbai. India
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Grover N, Emandi G, Twamley B, Khurana B, Sol V, Senge MO. Synthesis and Structure of meso-Substituted Dibenzihomoporphyrins. European J Org Chem 2020; 2020:6489-6496. [PMID: 33328793 PMCID: PMC7702178 DOI: 10.1002/ejoc.202001165] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Indexed: 01/30/2023]
Abstract
Bench-stable meso-substituted di(p/m-benzi)homoporphyrins were synthesized through acid-catalyzed condensation of dipyrrole derivatives with aryl aldehydes. The insertion of a 1,1,2,2-tetraphenylethene (TPE) or but-2-ene-2,3-diyldibenzene unit in the porphyrin framework results in the formation of dibenzihomoporphyrins, merging the features of hydrocarbons and porphyrins. Single crystal X-ray analyses established the non-planar structure of these molecules, with the phenylene rings out of the mean plane, as defined by the dipyrromethene moiety and the two meso-carbon atoms. Spectroscopic and structural investigations show that the macrocycles exhibit characteristics of both TPE or but-2-ene-2,3-diyldibenzene and dipyrromethene units indicating the non-aromatic characteristics of the compounds synthesized. Additionally, the dibenzihomoporphyrins were found to generate singlet oxygen, potentially allowing their use as photosensitizers.
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Affiliation(s)
- Nitika Grover
- School of ChemistryThe University of DublinTrinity College DublinDublin 2Ireland
| | - Ganapathi Emandi
- School of ChemistryThe University of DublinTrinity College DublinDublin 2Ireland
| | - Brendan Twamley
- School of ChemistryTrinity College DublinThe University of DublinDublin 2Ireland
| | - Bhavya Khurana
- Medicinal ChemistryTrinity Translational Medicine InstituteThe University of Dublin, St James's HospitalDublin 8Ireland
- Laboratoire PEIRENE, EA 7500Université de Limoges87000LimogesFrance
| | - Vincent Sol
- Laboratoire PEIRENE, EA 7500Université de Limoges87000LimogesFrance
| | - Mathias O. Senge
- Medicinal ChemistryTrinity Translational Medicine InstituteThe University of Dublin, St James's HospitalDublin 8Ireland
- Technical University of MunichInstitute for Advanced Study (TUM‐IAS)Lichtenbergstrasse 2a85748GarchingGermany
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Panda KN, Thorat KG, Ravikanth M. Core-Modified Pentaphyrins(2.1.1.1.1) and Bis(difluoroborane) Complex: Synthesis, Structure, and Spectral and Redox Properties. Inorg Chem 2020; 59:3585-3595. [PMID: 32090544 DOI: 10.1021/acs.inorgchem.9b02905] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A series of hetero analogues of pentaphyrins(2.1.1.1.1) such as oxapentaphyrins(2.1.1.1.1) and thiapentaphyrins(2.1.1.1.1) were synthesized by 3 + 2 condensation of dipyrroethenedicarbinol with 16-oxatripyrrane/16-thiatripyrrane under mild acid-catalyzed reaction conditions. The stable macrocycles are freely soluble in organic solvents, and their identities were confirmed by a corresponding molecular-ion peak in high-resolution mass spectrometry, 1D and 2D NMR spectroscopy, and X-ray structure obtained for one of the oxapentaphyrin(2.1.1.1.1) macrocycles. The crystal structure and NMR studies indicated that the heterocyclic ring, such as furan in oxapentaphyrins(2.1.1.1.1) and thiophene in thiapentaphyrins(2.1.1.1.1), was inverted. In absorption spectra, the macrocycles showed one sharp band at ∼516 nm and one broad band at ∼744 nm. The spectral and X-ray studies supported the nonaromatic nature of these macrocycles. This is in contrast to the recently reported aza analogue of pentaphyrins(2.1.1.1.1), which showed antiaromatic behavior. Upon protonation, the core-modified pentaphyrins(2.1.1.1.1) macrocycles exhibited bathochromically shifted absorption bands with a distinct change in the color of the solution. The 1H NMR, nucleus-independent chemical shift, and anisotropy-induced current density studies indicated the presence of Mobius aromaticity in the protonated macrocycles. The core-modified pentaphyrins(2.1.1.1.1) can act as good coordinating ligands, as shown here by synthesizing a bis(difluoroborane) complex of one of the thiapentaphyrins(2.1.1.1.1).
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Affiliation(s)
- Kamakshya Nath Panda
- Department of Chemistry, Indian Institute of Technology (IIT) Bombay, Mumbai 400 076, India
| | - Kishor G Thorat
- Department of Chemistry, Indian Institute of Technology (IIT) Bombay, Mumbai 400 076, India
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Rawat N, Thorat KG, Kumar S, Ravikanth M. Synthesis of Expanded Hetero 2,6-Pyrihexaphyrins. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901766] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Nisha Rawat
- Indian Institute of Technology; 400076 Powai Mumbai India
| | | | - Sunit Kumar
- Indian Institute of Technology; 400076 Powai Mumbai India
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Chinta RVRN, Aradhyula BPR, Murali AC, Venkatasubbaiah K. Synthesis, photophysical and electrochemical properties of naphthaldimine based boron complexes. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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