1
|
Osowski A, Kasparek A, Wieczorek Z, Amarowicz R, Szabelski M. Evaluation of the characteristics of some plant polyphenols as molecules intercepting mitoxantrone. Food Chem 2017; 227:142-148. [DOI: 10.1016/j.foodchem.2017.01.083] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 12/02/2016] [Accepted: 01/16/2017] [Indexed: 01/11/2023]
|
2
|
Kaur J, Damle M, Mande H, Ghalsasi P, Kondedeshmukh R, Bandyopadhyay P, Chikate R. Ruthenium(II) complexes of aroylhydrazones: structural, electrochemical and electrostatic interactions with DNA. J COORD CHEM 2017. [DOI: 10.1080/00958972.2017.1307344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Jatinder Kaur
- Department of Chemistry, Post-Graduate and Research Center, MES AbasahebGarware College, Pune, India
- Department of Chemistry, Fergusson College, Pune, India
| | - Madhura Damle
- Department of Chemistry, Post-Graduate and Research Center, MES AbasahebGarware College, Pune, India
| | - Hemant Mande
- Faculty of Science, Department of Chemistry, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | - Prasanna Ghalsasi
- Faculty of Science, Department of Chemistry, The Maharaja Sayajirao University of Baroda, Vadodara, India
| | | | | | - Rajeev Chikate
- Department of Chemistry, Post-Graduate and Research Center, MES AbasahebGarware College, Pune, India
| |
Collapse
|
3
|
Stępień M, Gońka E, Żyła M, Sprutta N. Heterocyclic Nanographenes and Other Polycyclic Heteroaromatic Compounds: Synthetic Routes, Properties, and Applications. Chem Rev 2016; 117:3479-3716. [PMID: 27258218 DOI: 10.1021/acs.chemrev.6b00076] [Citation(s) in RCA: 851] [Impact Index Per Article: 106.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Two-dimensionally extended, polycyclic heteroaromatic molecules (heterocyclic nanographenes) are a highly versatile class of organic materials, applicable as functional chromophores and organic semiconductors. In this Review, we discuss the rich chemistry of large heteroaromatics, focusing on their synthesis, electronic properties, and applications in materials science. This Review summarizes the historical development and current state of the art in this rapidly expanding field of research, which has become one of the key exploration areas of modern heterocyclic chemistry.
Collapse
Affiliation(s)
- Marcin Stępień
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Elżbieta Gońka
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Marika Żyła
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Natasza Sprutta
- Wydział Chemii, Uniwersytet Wrocławski , ul. F. Joliot-Curie 14, 50-383 Wrocław, Poland
| |
Collapse
|
4
|
Mixed-ligand complexes of ruthenium(II) incorporating a diazo ligand: Synthesis, characterization and DNA binding. J CHEM SCI 2016. [DOI: 10.1007/bf03356110] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
5
|
Chen L, Chao H, Zhao Q, Zheng X, Li H. Photoluminescence quenching of [Ru(bpy)2(atatp)]2+ bound to a condensed DNA matrix. J Inorg Biochem 2016; 154:1-6. [DOI: 10.1016/j.jinorgbio.2015.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2015] [Revised: 09/24/2015] [Accepted: 10/05/2015] [Indexed: 12/25/2022]
|
6
|
Swavey S, DeBeer M, Li K. Photoinduced Interactions of Supramolecular Ruthenium(II) Complexes with Plasmid DNA: Synthesis and Spectroscopic, Electrochemical, and DNA Photocleavage Studies. Inorg Chem 2015; 54:3139-47. [DOI: 10.1021/ic502340p] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Shawn Swavey
- SupraMolecular Applied Research
and Technology Center, Department of Chemistry, University of Dayton, 300 College Park, Dayton, Ohio 45469-2357, United States
| | - Madeleine DeBeer
- SupraMolecular Applied Research
and Technology Center, Department of Chemistry, University of Dayton, 300 College Park, Dayton, Ohio 45469-2357, United States
| | - Kaiyu Li
- SupraMolecular Applied Research
and Technology Center, Department of Chemistry, University of Dayton, 300 College Park, Dayton, Ohio 45469-2357, United States
| |
Collapse
|
7
|
Chen FJ, Xu M, Xi PX, Liu HY, Zeng ZZ. Synthesis, DNA binding and cleavage activities of copper (II) thiocyanate complex with 4-(N,N-dimethylamino)pyridine and N,N-dimethylformamide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 81:21-27. [PMID: 21723777 DOI: 10.1016/j.saa.2011.05.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 05/12/2011] [Accepted: 05/16/2011] [Indexed: 05/31/2023]
Abstract
Two novel copper(II) thiocyanate complexes with 4-(N,N-dimethylamino) pyridine and N,N-dimethylformamide (1) and with 4-(N,N-dimethylamino) pyridine (2) have been synthesized and characterized. The crystal and molecular structures of complexes 1 and 2 were determined by single-crystal X-ray diffraction. Antioxidative activity tests in vitro showed that complex 1 has significant antioxidative activity against hydroxyl free radicals from the Fenton reaction and also oxygen free radicals, which is better than standard antioxidants like vitamin C and mannitol. The interaction of complex 1 with calf thymus DNA was investigated by spectroscopic, cyclic voltammetry, and viscosity measurements. Results suggest that complex 1 can bind to DNA via partial intercalation mode. Moreover, complex 1 has been found to cleavage of plasmid DNA pBR322.
Collapse
Affiliation(s)
- Feng-juan Chen
- State Key Laboratory of Applied Organic Chemistry and College of Chemistry and Chemical Engineering, Lanzhou University, Tian-shui Road 222, Lanzhou 730000, PR China
| | | | | | | | | |
Collapse
|
8
|
Patel MN, Parmar PA, Gandhi DS. Synthesis, characterization and DNA binding and cleavage properties of ruthenium(II) complexes with various polypyridyls. J Enzyme Inhib Med Chem 2011; 26:734-41. [PMID: 21749187 DOI: 10.3109/14756366.2011.570007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Polypyridyl chlororuthenium(II) complexes have been synthesized and characterized. The binding mode of the complexes to DNA has been evaluated from the combined results of electronic absorption spectroscopy and viscosity measurement study. The results suggest that complexes 1, 2 and 3 bind to DNA via classical intercalation, electrostatic interaction and partial intercalation mode, respectively. Complex 2 shows less affinity for DNA. Cleavage of pUC19 DNA by complexes has been checked using gel electrophoresis. The data disclose that complex 1 has the highest cleaving ability.
Collapse
Affiliation(s)
- Mohan N Patel
- Department of Chemistry, Sardar Patel University, Vallabh Vidyanagar, Gujarat, India.
| | | | | |
Collapse
|
9
|
Ashwini Kumar K, Laxma Reddy K, Satyanarayana S. Study of the interaction between ruthenium(II) complexes and CT-DNA: synthesis, characterisation, photocleavage and antimicrobial activity studies. Supramol Chem 2010. [DOI: 10.1080/10610278.2010.510194] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- K. Ashwini Kumar
- a Department of Chemistry , Osmania University , Hyderabad, Andhra Pradesh, 500007, India
| | - Kotha Laxma Reddy
- a Department of Chemistry , Osmania University , Hyderabad, Andhra Pradesh, 500007, India
| | - S. Satyanarayana
- a Department of Chemistry , Osmania University , Hyderabad, Andhra Pradesh, 500007, India
| |
Collapse
|
10
|
Kumar KA, Reddy KL, Satyanarayana S. Synthesis, characterization, and DNA binding of ruthenium(II) complexes with 2-benzo[b] furan-2-yl-1H-imidazo[4,5f][1,10]phenanthroline as an intercalative ligand. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.516823] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- K. Ashwini Kumar
- a Department of Chemistry , Osmania University , Hyderabad 500 007, India
| | - Kotha Laxma Reddy
- a Department of Chemistry , Osmania University , Hyderabad 500 007, India
| | - S. Satyanarayana
- a Department of Chemistry , Osmania University , Hyderabad 500 007, India
| |
Collapse
|
11
|
Kumar KA, Reddy KL, Satyanarayana S. Synthesis, DNA interaction and photocleavage studies of ruthenium(II) complexes with 2-(pyrrole) imidazo[4,5-f]-1,10-phenanthroline as an intercalative ligand. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9384-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
12
|
Gao EJ, Wang KH, Zhu MC, Liu L. Hairpin-shaped tetranuclear palladium(II) complex: synthesis, crystal structure, DNA binding and cytotoxicity activity studies. Eur J Med Chem 2010; 45:2784-90. [PMID: 20359787 DOI: 10.1016/j.ejmech.2010.02.061] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2009] [Revised: 02/23/2010] [Accepted: 02/27/2010] [Indexed: 11/30/2022]
Abstract
A novel tetranuclear palladium(II) complex [Pd(4)(phen)(4) (micro-pydc)(4)].10H(2)O (phen = 1,10-phenanthroline, pydc = pyridine-3,4-dicarboxylate) has been synthesized and characterized. In the tetranuclear complex, two pairs of dipalladated [Pd(phen)] moieties are bridged together by four pydc, presenting a hairpin molecular shape. The binding of the title complex with fish sperm DNA (FS-DNA) has been investigated by UV spectrum and fluorescence spectrum. All the results indicate that the complex bind to DNA in an intercalative mode and considerating the molecular shape and size, the dipalladated phenanthroline moieties bisintercalate to the base pairs of DNA. Agarose gel electrophoresis assay demonstrates the ability of the complex to cleave the pBR322 plasmid DNA. Cytotoxic activity studies show the complex exhibited good cytotoxic activity against four different cancer cell lines.
Collapse
Affiliation(s)
- En-Jun Gao
- Laboratory of Coordination Chemisty, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | | | | | | |
Collapse
|
13
|
Peng B, Chen X, Du KJ, Yu BL, Chao H, Ji LN. Synthesis, characterization and DNA-binding studies of ruthenium(II) mixed-ligand complexes containing dipyrido[1,2,5]oxadiazolo[3,4-b]quinoxaline. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 74:896-901. [PMID: 19748821 DOI: 10.1016/j.saa.2009.08.031] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2009] [Revised: 07/25/2009] [Accepted: 08/07/2009] [Indexed: 05/28/2023]
Abstract
A novel ligand dipyrido[1,2,5]oxadiazolo[3,4-b]quinoxaline (dpoq) and its complexes [Ru(bpy)(2)(dpoq)](2+) and [Ru(phen)(2)(dpoq)](2+) (bpy=2,2'-bipyridine; phen=1,10-phenanthroline) have been synthesized and characterized by elemental analysis, electrospray mass spectra and (1)H NMR. The interaction of Ru(II) complexes with calf thymus DNA (CT-DNA) was investigated by absorption spectroscopy, fluorescence spectroscopy, thermal denaturation and viscosity measurements. Results suggest that two Ru(II) complexes bind to DNA via an intercalative mode.
Collapse
Affiliation(s)
- Bin Peng
- MOE Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
| | | | | | | | | | | |
Collapse
|
14
|
|
15
|
Synthesis, DNA-binding and photocleavage studies of Ru(II) complexes of phenyl-(4,5,9,14-tetraaza-benzo[b]triphenylen-1,1-yl)-methanone. J CHEM SCI 2009. [DOI: 10.1007/s12039-009-0046-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
16
|
Tan LF, Liang XL, Liu XH. Synthesis, double stranded DNA-binding and photocleavage studies of a functionalized ruthenium(II) complex with 7,7′-methylenedioxyphenyldipyrido[3,2-a:2′,3′-c]-phenazine. J Inorg Biochem 2009; 103:441-7. [DOI: 10.1016/j.jinorgbio.2008.12.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2008] [Revised: 12/16/2008] [Accepted: 12/18/2008] [Indexed: 11/25/2022]
|
17
|
Gao F, Chao H, Ji LN. DNA Binding, Photocleavage, and Topoisomerase Inhibition of Functionalized Ruthenium(II)-Polypyridine Complexes. Chem Biodivers 2008; 5:1962-1979. [DOI: 10.1002/cbdv.200890181] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
18
|
Tan LF, Wang F, Chao H, Zhang S, Fei JJ, Ji LN. DNA Interactions of the Functionalized (Mixed Polypyridine)ruthenium(II) Complex Bis(2,2′-bipyridine-κN1,κN1′)(methyl dipyrido[3,2-a : 2′,3′-c]phenazine-11-carboxylate-κN4,κN5)ruthenium(2+) ([Ru(bpy)2(dppz-11-CO2Me)]2+). Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890136] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
19
|
Gao F, Chao H, Wei YF, Yuan YX, Peng B, Chen X, Zheng KC, Ji LN. Synthesis, DNA-Binding and Photocleavage Studies of the Ruthenium(II) Complexes [Ru(phen)2(ppd)]2+ and [Ru(phen)(ppd)2]2+ (ppd=Pteridino[6,7-f] [1,10]phenanthroline-11,13(10H,12H)-dione, phen=1,10-Phenanthroline). Helv Chim Acta 2008. [DOI: 10.1002/hlca.200890045] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
20
|
Yuan YX, Wang YC, Jiang L, Gao F, Liang SM, Su CY, Chao H, Ji LN. Synthesis, Characterization, and DNA Binding Studies of Ruthenium(II) Complexes with 2-Pyridyl-1H-anthra[1,2-d]imidazole-6,11-dione. Aust J Chem 2008. [DOI: 10.1071/ch08127] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Three novel asymmetric ruthenium(ii) complexes, [Ru(bpy)2(PAIDH)]2+ 1, [Ru(phen)2(PAIDH)]2+ 2, and [Ru(dmp)2(PAIDH)]2+ 3 (bpy = 2,2′-bipyridine, phen = 1,10-phenanthroline, dmp = 2,9-dimethyl-1,10-phenanthroline, PAIDH = 2-pyridyl-1H-anthra[1,2-d]imidazole-6,11-dione), have been synthesized and characterized. The structure of the deprotonated complex [Ru(dmp)2(PAID)]+ 4 has been determined by single-crystal X-ray diffraction techniques, and the anthraquinone moiety is approximately coplanar with the imidazole ring. The DNA binding properities of complexes 1, 2, and 3 to calf-thymus DNA (CT-DNA) were investigated. Spectroscopic studies and viscosity experiments suggest that the RuII complexes intercalate into DNA base pairs by the extended anthraquinone unit, and the ancillary ligands have significant effects on the spectroscopic properties and DNA binding behaviour of the RuII complexes.
Collapse
|
21
|
Tan L, Chao H, Fei J, Su G, Zhang S, Xia Y, Ji L. DNA-Binding and Photocleavage Behaviour of [Ru(bpy)2(MDPZ)]2+. Aust J Chem 2008. [DOI: 10.1071/ch08056] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The new ligand MDPZ (MDPZ = 7,7′-methylenedioxyphenyldipyrido[3,2-a:2′,3′-c]-phenazine and its RuII complex [Ru(bpy)2(MDPZ)]2+ (phen = 1,10-phenanthroline) was synthesized and characterized by elemental analysis, mass spectrometry, and 1H NMR spectroscopy. The DNA-binding properties of [Ru(bpy)2(MDPZ)]2+ were investigated by different spectrophotometric methods and viscosity measurements. The results suggest that the complex binds to CT-DNA through intercalation, and can enantioselectively interact with CT-DNA. Although the [Ru(bpy)2(MDPZ)]2+ complex does not show the characteristics of a molecular ‘light switch’ for DNA, [Ru(phen)2(MDPZ)]2+ may serve as a sensitive luminescent probe for DNA. Also, when irradiated at 365 nm, the complex promotes the photocleavage of pBR 322 DNA.
Collapse
|
22
|
Han MJ, Chen YM, Wang KZ. Ruthenium(ii) complexes of 6-hydroxydipyrido[3,2-a:2′,3′-c]phenazine: self-association, and concentration-dependent acid–base and DNA-binding properties. NEW J CHEM 2008. [DOI: 10.1039/b711759k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
23
|
Tan L, Zhang S, Liu X, Xiao Y. Synthesis, Characterization, DNA Binding, and Photocleavage of [Ru(bpy)2(MFIP)]2+ and [Ru(phen)2(MFIP)]2+. Aust J Chem 2008. [DOI: 10.1071/ch08119] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The new ligand 2-(5-methyl-furan-2-yl)imidazo[4,5-f][1, 10]phenanthroline (MFIP) and its complexes [Ru(bpy)2(MFIP)]2+ 1 (bpy = 2,2′-bipyridine) and [Ru(phen)2(MFIP)]2+ 2 (phen = 1,10-phenanthroline) were synthesized and characterized by elemental analysis, mass spectrometry, and 1H NMR spectroscopy. The DNA binding properties of the two complexes were investigated by different spectrophotometric methods and viscosity measurements. The results suggest that both complexes bind to calf thymus DNA (CT-DNA) through intercalation, and both complexes can enantioselectively interact with CT-DNA. The Λ enantiomers of both complexes are slightly predominant for binding to CT-DNA over the Δ enantiomer. When irradiated at 400 nm, the two complexes promote the photocleavage of pBR322 DNA, and complex 2 cleaves DNA more effectively than complex 1 under comparable experimental conditions. Furthermore, mechanism studies reveal that singlet oxygen (1O2) plays a significant role in the photocleavage.
Collapse
|
24
|
Tan LF, Chao H. DNA-binding and photocleavage studies of mixed polypyridyl ruthenium(II) complexes with calf thymus DNA. Inorganica Chim Acta 2007. [DOI: 10.1016/j.ica.2006.10.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
25
|
Tan LF, Wang F, Chao H, Zhou YF, Weng C. Ruthenium(II) mixed-ligand complex containing 2-(4′-benzyloxy-phenyl)imidazo[4,5-f][1,10]phenanthroline: Synthesis, DNA-binding and photocleavage studies. J Inorg Biochem 2007; 101:700-8. [PMID: 17316812 DOI: 10.1016/j.jinorgbio.2006.12.016] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 12/23/2006] [Accepted: 12/27/2006] [Indexed: 11/23/2022]
Abstract
A novel polypyridyl ligand 2-(4'-benzyloxyphenyl)imidazo[4,5-f][1,10]phenanthroline (BPIP) and its complex [Ru(bpy)2(BPIP)]2+ (1) (bpy=2,2'-bipyridine) and (2) [Ru(phen)2(BPIP)]2+) (phen=1,10-phenanthroline) have been synthesized and characterized by elemental analysis, electrospray mass spectra and 1H NMR. The DNA-binding properties of the two complexes were investigated by spectroscopic and viscosity measurements. The results suggest that both complexes bind to DNA via an intercalative mode. Both complexes can enantioselectively interact with calf thymus DNA (CT-DNA) in a way. The Lambda enantiomer of complex 1 is slightly predominant for binding to CT-DNA to the Delta enantiomer. Under irradiation at 365 nm, both complexes have also been found to promote the photocleavage of plasmid pBR 322 DNA. Inhibitors studies suggest that singlet oxygen ((1)O2) and hydroxyl radical (*OH) play a significant role in the cleavage mechanism for both complexes. Moreover, the DNA-binding and photocleavage properties of both complexes were compared with that of [Ru(bpy)2(BPIP)]2+ and [Ru(phen)2(BPIP)]2+. The experimental results indicate that methene group existence or not have a significant effect on the DNA-binding and cleavage mechanism of these complexes.
Collapse
Affiliation(s)
- Li-Feng Tan
- College of Chemistry, Xiangtan University, Xiangtan 411105, PR China.
| | | | | | | | | |
Collapse
|
26
|
Gao F, Chao H, Zhou F, Xu LC, Zheng KC, Ji LN. Synthesis, Characterization, and DNA-Binding Properties of the Chiral Ruthenium(II) Complexes Δ- and Λ-[Ru(bpy)2(dmppd)]2+ (dmppd = 10,12-Dimethylpteridino[6,7-f] [1,10]phenanthroline-11,13(10H,12H)-dione; bpy = 2,2′-Bipyridine). Helv Chim Acta 2007. [DOI: 10.1002/hlca.200790019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
27
|
Mei WJ, Liu YJ, Wang N, Ma YZ, Wang H, Luo LQ, Huang SL. The photocleavage properties of a novel ruthenium(II) complex on liver cancer cells Bel-7402 DNA. TRANSIT METAL CHEM 2006. [DOI: 10.1007/s11243-006-0104-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
28
|
Gao F, Chao H, Zhou F, Yuan YX, Peng B, Ji LN. DNA interactions of a functionalized ruthenium(II) mixed-polypyridyl complex [Ru(bpy)2ppd]2+. J Inorg Biochem 2006; 100:1487-94. [PMID: 16766033 DOI: 10.1016/j.jinorgbio.2006.04.008] [Citation(s) in RCA: 234] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2005] [Revised: 02/15/2006] [Accepted: 04/08/2006] [Indexed: 11/29/2022]
Abstract
A novel polypyridyl ligand pteridino[7,6-f][1,10]phenanthroline-1,13(10H,12H)-dione (ppd) and its ruthenium(II) complex [Ru(bpy)2ppd]2+ have been synthesized and characterized by elemental analysis, electrospray mass spectra and 1H NMR. The interaction of the complex with calf thymus DNA was investigated by spectroscopic and viscosity measurements. The results suggest that the complex binds to DNA via an intercalative mode and serves as a molecular "light switch" for DNA. Moreover, the complex has been found to promote the photocleavage of plasmid DNA pBR322 under irradiation at 365 nm. The mechanism studies reveal that singlet oxygen (1O2) and superoxide anion radical (O2*(-))play a significant role in the photocleavage.
Collapse
Affiliation(s)
- Feng Gao
- Department of Chemistry, State Key Laboratory of Optoelectronic Materials and Technologies, The Key Laboratory of Gene Enginerring of Ministry of Education, Sun Yat-Sen University, Guanghou 510275, PR China
| | | | | | | | | | | |
Collapse
|
29
|
Pietrzak M, Wieczorek Z, Wieczorek J, Darzynkiewicz Z. The "interceptor" properties of chlorophyllin measured within the three-component system: intercalator-DNA-chlorophyllin. Biophys Chem 2006; 123:11-9. [PMID: 16650923 PMCID: PMC3488280 DOI: 10.1016/j.bpc.2006.03.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2006] [Revised: 03/28/2006] [Accepted: 03/30/2006] [Indexed: 10/24/2022]
Abstract
In aqueous solutions, in the presence of double-stranded DNA, chlorophyllin (CHL) forms complexes with each of the three DNA intercalators: acridine orange (AO), quinacrine mustard (QM), and doxorubicin (DOX). The evidence for these interactions was obtained by measurement changes in the absorption and fluorescence spectra of the mixtures containing DNA and intercalators during titration with CHL. A model of simple competition between DNA and CHL for the intercalator was used to define the measured interactions. The concentrations of the complexes estimated based on this model were consistent with the concentrations obtained by actual measurement of the absorption spectra. The present data provide further support for the role of chlorophyllin as an "interceptor" that may neutralize biological activity of aromatic compounds including mutagens and antitumor drugs.
Collapse
Affiliation(s)
- Monika Pietrzak
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
| | - Zbigniew Wieczorek
- Department of Physics and Biophysics, University of Warmia and Mazury in Olsztyn, Oczapowskiego 4, 10-719 Olsztyn, Poland
- Corresponding author: Tel./fax: +48 89 523 45 47. (Z. Wieczorek)
| | - Jolanta Wieczorek
- Department of Commodities and Food Research, University of Warmia and Mazury in Olsztyn, Cieszyński Square 1, 10-726 Olsztyn, Poland
| | - Zbigniew Darzynkiewicz
- Brander Cancer Research Institute at New York Medical College, Hawthorne, NY, 10532, USA
| |
Collapse
|
30
|
Han MJ, Gao LH, Wang KZ. Ruthenium(ii) complex of 2-(9-anthryl)-1H-imidazo[4,5-f][1,10]phenanthroline: synthesis, spectrophotometric pH titrations and DNA interaction. NEW J CHEM 2006. [DOI: 10.1039/b511358j] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
31
|
Chen H, Yang P, Yuan C, Pu X. Study on the Binding of Base-Mismatched Oligonucleotide d(GCGAGC)2 by Cobalt(III) Complexes. Eur J Inorg Chem 2005. [DOI: 10.1002/ejic.200401041] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
32
|
Ghosh T, Maiya BG, Samanta A, Shukla AD, Jose DA, Kumar DK, Das A. Mixed-ligand complexes of ruthenium(II) containing new photoactive or electroactive ligands: synthesis, spectral characterization and DNA interactions. J Biol Inorg Chem 2005; 10:496-508. [PMID: 15981005 DOI: 10.1007/s00775-005-0660-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2005] [Accepted: 05/11/2005] [Indexed: 11/25/2022]
Abstract
Mixed-ligand ruthenium(II) complexes of three photoactive ligands, viz., (E)-1-[2-(4-methyl-2-pyridyl)-4-pyridyl]-2-(1-naphthyl)-1-ethene (mppne), (E)-1-(9-anthryl)-2-[2-(4-methyl-2-pyridyl)-4-pyridyl]-1-ethene (mppae) and (E)-1-[2-(4-methyl-2-pyridyl)-4-pyridyl]-2-(1-pyrenyl)-1-ethene (mpppe), in which a 2,2'-bipyridyl unit is linked via an ethylinic linkage to either a naphthalene, an anthracene or a pyrene chromophore and three electroactive ligands, viz., 4-(4-pyridyl)-1,2-benzenediol (catpy), 5,6-dihydroxy-1,10-phenanthroline (catphen) and 1,2-benzenediol (cat), were synthesized in good to moderate yields. Complexes [Ru(bpy)(2)(mppne)](2+) (bpy is 2, 2'-bipyridyl), [Ru(bpy)(2)(mppae)](2+), [Ru(bpy)(2)(mpppe)](2+), [Ru(bpy)(2)(sq-py)](+), [Ru(bpy)(2)(sq-phen)](+) and [Ru(phen)(2)(bsq)](+) (phen is 1,10-phenanthroline) were fully characterized by elemental analysis, IR, (1)H NMR, fast-atom bombardment or electron-impact mass, UV-vis and cyclic voltammetric methods. In the latter three complexes, the ligands catpy, catphen and cat are actually bound to the metal center as the corresponding semiquinone species, viz., 4-(4-pyridyl)-1,2-benzenedioleto(+I) (sq-py), 1,10-phenanthroline-5,6-dioleto(+I) (sq-phen) and 1,2-benzenedioleto(+I) (bsq), thus making the overall charge of the complexes formally equal to + 1 in each case. These three complexes are electron paramagnetic resonance active and exhibit an intense absorption band between 941 and 958 nm owing to metal-to-ligand charge transfer (MLCT, d (Ru)-->pi*(sq)) transitions. The other three ruthenium(II) complexes containing three photoactive ligands, mppne, mppae and mpppe, exhibit MLCT (d (Ru)-->pi*(bpy) ) bands in the 454-461-nm region and are diamagnetic. These can be characterized by the (1)H NMR method. [Ru(bpy)(2)(mppne)](2+), [Ru(bpy)(2)(mppae)](2+) and [Ru(bpy)(2)(mpppe)](2+) exhibit redox waves corresponding to the Ru(III)/Ru(II) couple along with the expected ligand (bpy and substituted bpy) based ones in their cyclic and differential pulse voltammograms (CH(3)CN, 0.1 M tetrabutylammonium hexafluorophosphate)-corresponding voltammograms of [Ru(bpy)(2)(sq-py)](+), [Ru(bpy)(2)(sq-phen)](+) and [Ru(phen)(2)(bsq)](+) are mainly characterized by waves corresponding to the quinone/semiquinone (q/sq) and semiquinone/1,2-diol (sq/cat) redox processes. The results of absorption and fluorescence titration as well as thermal denaturation studies reveal that [Ru(bpy)(2)(mppne)](2+) and [Ru(bpy)(2)(mppae)](2+) are moderate-to-strong binders of calf thymus DNA with binding constants ranging from 10(5) to 10(6) M(-1). Under the identical conditions of drug and light dose, the DNA (supercoiled pBR 322) photocleavage activities of these two complexes follow the order:[Ru(bpy)(2)(mppne)](2+)>[Ru(bpy)(2)(mppae)](2+), although the emission quantum yields follow the reverse order. The other ruthenium(II) complexes containing the semiquinone-based ligands are found to be nonluminescent and inefficient photocleavage agents of DNA. However, experiments shows that [Ru(bpy)(2)(sq)](+)-based complexes oxidize the sugar unit and could be used as mild oxidants for the sugar moiety of DNA. Possible explanations for these observations are presented.
Collapse
Affiliation(s)
- Tamal Ghosh
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, India
| | | | | | | | | | | | | |
Collapse
|
33
|
Liu YJ, Chao H, Tan LF, Yuan YX, Wei W, Ji LN. Interaction of polypyridyl ruthenium (II) complex containing asymmetric ligand with DNA. J Inorg Biochem 2005; 99:530-7. [PMID: 15621286 DOI: 10.1016/j.jinorgbio.2004.10.030] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Revised: 10/20/2004] [Accepted: 10/22/2004] [Indexed: 11/21/2022]
Abstract
A novel asymmetric bidentate ruthenium (II) complex, [Ru(bpy)(2)(PYNI)](2+) (bpy=2,2'-bipyridine, PYNI=2-(2'-pyridyl)naphthoimidazole), has been synthesized and characterized by elemental analysis, ES-MS (electrospray mass spectra) and (1)H NMR. The electrochemical behaviors of this complex were studied by cyclic voltammetry. DNA interaction studies suggest that [Ru(bpy)(2)(PYNI)](2+) binds to calf thymus DNA (CT-DNA) in an intercalative mode. Interestingly, this new Ru(II) complex has also been found to promote cleavage of plasmid pBR 322 DNA from the supercoiled form I to the open circular form II upon irradiation.
Collapse
Affiliation(s)
- Yun-Jun Liu
- Department of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | | | | | | | | | | |
Collapse
|
34
|
Tan LF, Chao H, Li H, Liu YJ, Sun B, Wei W, Ji LN. Synthesis, characterization, DNA-binding and photocleavage studies of [Ru(bpy)2(PPIP)]2+ and [Ru(phen)2(PPIP)]2+. J Inorg Biochem 2005; 99:513-20. [PMID: 15621284 DOI: 10.1016/j.jinorgbio.2004.10.028] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2004] [Revised: 09/20/2004] [Accepted: 10/25/2004] [Indexed: 10/26/2022]
Abstract
A novel ligand 2-(4'-phenoxy-phenyl)imidazo[4,5-f][1,10]phenanthroline (PPIP) and its complexes [Ru(bpy)(2)(PPIP)](2+) (1) (bpy = 2,2'-bipyridine) and [Ru(phen)(2)(PPIP)](2+) (2) (phen = 1,10-phenanthroline) have been synthesized and characterized by mass spectroscopy, (1)H NMR and cyclic voltammetry. The interaction of two complexes with calf thymus DNA (CT-DNA) was investigated by spectroscopic and viscosity measurements. The results suggest that both complexes bind to DNA via an intercalative mode. Both complexes have also been found to promote the photocleavage of plasmid pBR 322 DNA under irradiated.
Collapse
Affiliation(s)
- Li-Feng Tan
- Department of Chemistry, Sun Yat-Sen University, Guangzhou 510275, PR China
| | | | | | | | | | | | | |
Collapse
|
35
|
Shi S, Liu J, Li J, Zheng KC, Tan CP, Chen LM, Ji LN. Electronic effect of different positions of the –NO2 group on the DNA-intercalator of chiral complexes [Ru(bpy)2L]2+(L =o-npip, m-npip and p-npip). Dalton Trans 2005:2038-46. [PMID: 15909056 DOI: 10.1039/b501112d] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
New chiral Ru(II) complexes with intercalators L (L =o-npip, m-npip and p-npip) containing -NO2 at different positions on the phenyl ring were synthesized and characterized by elemental analysis, 1H NMR, ESI-MS and CD spectra. The DNA binding properties of these complexes have been investigated with UV-Vis, emission spectra, CD spectra and viscosity measurements. A subtle but detectable difference was observed in the interaction of these isomers with CT-DNA. Absorption spectroscopy experiments indicated that each of these complexes can interact with the DNA. The DNA-binding of the Delta-isomer is stronger than that of Lambda-isomer. DNA-viscosity experiments provided evidence that both Delta- and Lambda-[Ru(bpy)2(o-npip)](PF6)2 bind to DNA with partial intercalation, and both Delta- and Lambda-[Ru(bpy)(2)(p-npip)](PF6)2 fully intercalate with DNA. However, Delta- and Lambda- [Ru(bpy)2(m-npip)](PF6)2 bind to DNA through different modes, i.e., the Delta isomer by intercalation and Lambda isomer by partial intercalation. Under irradiation with UV light, Ru(II) complexes showed different efficiency of cleaving DNA. The most interesting feature is that neither 1 (Delta-1 and Lambda-1) nor 3 (Delta-3 and Lambda-3) emit luminescence either alone in aqueous solution or in the presence of DNA, whereas both Delta-2 and Lambda-2 emit luminescence under the same conditions. In addition, theoretical calculations for these three isomer complexes have been carried out applying the density functional theory (DFT) method at the level of the B3LYP/LanL2DZ basis set, and the calculated results can reasonably explain the obtained experimental trends in the DNA-binding affinities or binding constants (Kb) and some spectral properties of the complexes.
Collapse
Affiliation(s)
- Shuo Shi
- School of Chemistry and Chemical Engineering/Key Laboratory of Gene Engineering of Ministry of Education/State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University, Guangzhou 510275, China
| | | | | | | | | | | | | |
Collapse
|
36
|
Mazumder UK, Gupta M, Karki SS, Bhattacharya S, Rathinasamy S, Thangavel S. Synthesis, Anticancer and Antibacterial Activity of Some Novel Mononuclear Ru(II) Complexes. Chem Pharm Bull (Tokyo) 2004; 52:178-85. [PMID: 14758001 DOI: 10.1248/cpb.52.178] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In search of potential anticancer drug candidates in ruthenium complexes, a series of mononuclear ruthenium complexes of the type [Ru(phen)(2)(nmit)]Cl(2) (Ru1), [Ru(bpy)(2)(nmit)]Cl(2) (Ru2), [Ru(phen)(2)(icpl)]Cl(2) (Ru3), Ru(bpy)(2)(icpl)]Cl(2) (Ru4) (phen=1,10-phenanthroline; bpy=2,2'-bipyridine; nmit=N-methyl-isatin-3-thiosemicarbazone, icpl=isatin-3-(4-Cl-phenyl)thiosemicarbazone) and [Ru(phen)(2)(aze)]Cl(2) (Ru5), [Ru(bpy)(2)(aze)]Cl(2) (Ru6) (aze=acetazolamide) and [Ru(phen)(2)(R-tsc)](ClO(4))(2) (R=methyl (Ru7), ethyl (Ru8), cyclohexyl (Ru9), 4-Cl-phenyl (10), 4-Br-phenyl (Ru11), and 4-EtO-phenyl (Ru12), tsc=thiosemicarbazone) were prepared and characterized by elemental analysis, FTIR, (1)H-NMR and FAB-MS. Effect of these complexes on the growth of a transplantable murine tumor cell line (Ehrlich Ascites Carcinoma) and their antibacterial activity were studied. In cancer study the effect of hematological profile of the tumor hosts have also been studied. In the cancer study, the complexes Ru1-Ru4, Ru10 and Ru11 have remarkably decreased the tumor volume and viable ascitic cell count as indicated by trypan blue dye exclusion test (p<0.05). Treatment with the ruthenium complexes prolonged the lifespan of Ehrlich Ascites Carcinoma (EAC) bearing mice. Tumor inhibition by the ruthenium chelates was followed by improvements in hemoglobin, RBC and WBC values. All the complexes showed antibacterial activity, except Ru5 and Ru6. Thus, the results suggest that these ruthenium complexes have significant antitumor property and antibacterial activity. The results also reflect that the drug does not adversely affect the hematological profiles as compared to that of cisplatin on the host.
Collapse
Affiliation(s)
- Upal Kanti Mazumder
- Department of Pharmaceutical Technology, Jadavpur University, Jadavpur, Japan
| | | | | | | | | | | |
Collapse
|
37
|
Deng H, Xu H, Yang Y, Li H, Zou H, Qu LH, Ji LN. Synthesis, characterization, DNA-binding and cleavage studies of [Ru(bpy)2(actatp)]2+ and [Ru(phen)2(actatp)]2+ (actatp=acenaphthereno[1,2-b]-1,4,8,9-tetraazariphenylence). J Inorg Biochem 2003; 97:207-14. [PMID: 14512199 DOI: 10.1016/s0162-0134(03)00279-4] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
New ligand acenaphthereno[1,2-b]-1,4,8,9-tetraazariphenylence (actatp) and its complexes [Ru(bpy)(2)(actatp)](ClO(4))(2).2H(2)O (1) (bpy=2,2'-bipyridine) and [Ru(phen)(2)(actatp)](ClO(4))(2).2H(2)O (2) (phen=1,10-phenanthroline) have been synthesized and characterized by UV-vis, 1H NMR, and mass spectra. The electrochemical behavior of the two complexes was studied by cyclic voltammetry. The interaction of the two complexes with calf thymus DNA has been investigated by spectrophotometric methods and viscosity measurements. The experimental results suggest that both complexes bind to DNA through an intercalative mode. The circular dichroism signals of the dialysates of the racemic complexes against calf thymus DNA are discussed. When irradiated at 302 nm, both complexes have also been found to promote the photocleavage of plasmid pBR 322 DNA.
Collapse
Affiliation(s)
- Hong Deng
- The Key Laboratory of Gene Engineering, Ministry of Education/School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou 510275, China
| | | | | | | | | | | | | |
Collapse
|
38
|
Sastri CV, Eswaramoorthy D, Giribabu L, Maiya BG. DNA interactions of new mixed-ligand complexes of cobalt(III) and nickel(II) that incorporate modified phenanthroline ligands. J Inorg Biochem 2003; 94:138-45. [PMID: 12620684 DOI: 10.1016/s0162-0134(02)00622-0] [Citation(s) in RCA: 119] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Four new mixed-ligand complexes, namely [Co(phen)(2)(qdppz)](3+), [Ni(phen)(2)(qdppz)](2+), [Co(phen)(2)(dicnq)](3+) and [Ni(phen)(2)(dicnq)](2+) (phen=1,10-phenanthroline, qdppz=naptho[2,3-a]dipyrido[3,2-H:2',3'-f]phenazine-5,18-dione and dicnq=dicyanodipyrido quinoxaline), were synthesized and characterized by FAB-MS, UV/Vis, IR, 1H NMR, cyclic voltammetry and magnetic susceptibility methods. Absorption and viscometric titration as well as thermal denaturation studies revealed that each of these octahedral complexes is an avid binder of calf-thymus DNA. The apparent binding constants for the dicnq- and qdppz-bearing complexes are in the order of 10(4) and >10(6) M(-1), respectively. Based on the data obtained, an intercalative mode of DNA binding is suggested for these complexes. While both the investigated cobalt(III) complexes and also [Ni(phen)(2)(qdppz)](2+) affected the photocleavage of DNA (supercoiled pBR 322) upon irradiation by 360 nm light, the corresponding dicnq complex of nickel(II) was found to be ineffective under a similar set of experimental conditions. The physico-chemical properties as well as salient features involved in the DNA interactions of the cobalt(III) and nickel(II) complexes investigated here were compared with each other and also with the corresponding properties of the previously reported ruthenium(II) analogues.
Collapse
Affiliation(s)
- C V Sastri
- School of Chemistry, University of Hyderabad, Gachibowli, 500 046, Hyderabad, India
| | | | | | | |
Collapse
|
39
|
Synthesis and rapid enantiomeric separation of the chiral mixed ligand [5-(4-hydroxybutyl)-5′-methyl-2,2′-bipyridine]-bis(1,10-phenanthroline)-ruthenium(II) complex by electrokinetic chromatography. ACTA ACUST UNITED AC 2002. [DOI: 10.1016/s0957-4166(02)00753-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
40
|
Vaidyanathan VG, Nair BU. Synthesis, characterization and DNA binding studies of a ruthenium(II) complex. J Inorg Biochem 2002; 91:405-12. [PMID: 12161310 DOI: 10.1016/s0162-0134(02)00448-8] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Ru(bzimpy)(2)]Cl(2), where bzimpy is 2,6-bis(benzimidazol-2-yl) pyridine was synthesized and characterized by ESI-MS, UV-Visible, (1)H NMR and fluorescence spectra. Absorption titration and thermal denaturation experiments indicate that the complex binds to DNA with moderate strength. Viscosity measurement shows that the mode of binding could be surface binding. Fluorescence study shows that the fluorescence intensity of the complex decreases with increasing concentrations of DNA, which is due to the photoelectron transfer from guanine base to (3)MLCT of the complex. Photoexcitation of the complex in the MLCT region in the presence of plasmid DNA has been found to give rise to nicking of DNA.
Collapse
|
41
|
Ji L, Zhang Q, Chao H. Functions and applications of polypyridyl complexes in DNA. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/bf03183383] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
42
|
DNA structure, binding mechanism and biology functions of polypyridyl complexes in biomedicine. ACTA ACUST UNITED AC 2001. [DOI: 10.1007/bf02879615] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|