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Bjelogrlić S, Todorović TR, Cvijetić I, Rodić MV, Vujčić M, Marković S, Araškov J, Janović B, Emhemmed F, Muller CD, Filipović NR. A novel binuclear hydrazone-based Cd(II) complex is a strong pro-apoptotic inducer with significant activity against 2D and 3D pancreatic cancer stem cells. J Inorg Biochem 2018; 190:45-66. [PMID: 30352315 DOI: 10.1016/j.jinorgbio.2018.10.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 09/16/2018] [Accepted: 10/03/2018] [Indexed: 11/29/2022]
Abstract
A novel binuclear Cd complex (1) with hydrazone-based ligand was prepared and characterized by spectroscopy and single crystal X-ray diffraction techniques. Complex 1 reveals a strong pro-apoptotic activity in both human, mammary adenocarcinoma cells (MCF-7) and pancreatic AsPC-1 cancer stem cells (CSCs). While apoptosis undergoes mostly caspase-independent, 1 stimulates the activation of intrinsic pathway with noteworthy down regulation of caspase-8 activity in respect to non-treated controls. Distribution of cells over mitotic division indicates that 1 caused DNA damage in both cell lines, which is confirmed in DNA interaction studies. Compared to 1, cisplatin (CDDP) does not achieve cell death in 2D cultured AsPC-1 cells, while induces different pattern of cell cycle changes and caspase activation in 2D cultured MCF-7 cells, implying that these two compounds do not share similar mechanism of action. Additionally, 1 acts as a powerful inducer of mitochondrial superoxide production with dissipated trans-membrane potential in the majority of the treated cells already after 6 h of incubation. On 3D tumors, 1 displays a superior activity against CSC model, and at 100 μM induces disintegration of spheroids within 2 days of incubation. Fluorescence spectroscopy, along with molecular docking show that compound 1 binds to the minor groove of DNA. Compound 1 binds to the human serum albumin (HSA) showing that the HSA can effectively transport and store 1 in the human body. Thus, our current study strongly supports further investigations on antitumor activity of 1 as a drug candidate for the treatment of highly resistant pancreatic cancer.
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Affiliation(s)
- Snežana Bjelogrlić
- National Cancer Research Center of Serbia, Pasterova 14, Belgrade, Serbia; Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Tamara R Todorović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Ilija Cvijetić
- Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Marko V Rodić
- Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, Novi Sad, Serbia
| | - Miroslava Vujčić
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Sanja Marković
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Jovana Araškov
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, Serbia
| | - Barbara Janović
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, Belgrade, Serbia
| | - Fathi Emhemmed
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Christian D Muller
- Institut Pluridisciplinaire Hubert Curien, UMR 7178 CNRS Université de Strasbourg, 67401 Illkirch, France
| | - Nenad R Filipović
- Faculty of Agriculture, University of Belgrade, Nemanjina 6, Belgrade, Serbia.
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2
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Wang J, Gou Y, Zhang Z, Yu P, Qi J, Qin Q, Sun H, Wu X, Liang H, Yang F. Developing an Anticancer Copper(II) Multitarget Pro-Drug Based on the His146 Residue in the IB Subdomain of Modified Human Serum Albumin. Mol Pharm 2018; 15:2180-2193. [PMID: 29722993 DOI: 10.1021/acs.molpharmaceut.8b00045] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Designing a multitarget anticancer drug with improved delivery and therapeutic efficiency in vivo presents a great challenge. Thus, we proposed to design an anticancer multitarget metal pro-drug derived from thiosemicarbazone based on the His146 residue in the IB subdomain of palmitic acid (PA)-modified human serum albumin (HSA-PA). The structure-activity relationship of six Cu(II) compounds with 6-methyl-2-formylpyridine-4N-substituted thiosemicarbazones were investigated, and then the multitarget capability of 4b was confirmed in cancer cell DNA and proteins. The structure of the HSA-PA-4b complex (HSA-PA-4b) revealed that 4b is bound to the IB subdomain of modified HSA, and that His146 replaces the nitrate ligand in 4b, coordinating with Cu2+, whereas PA is complexed with the IIA subdomain by its carboxyl forming hydrogen bonds with Lys199 and His242. In vivo data showed that 4b and the HSA-PA-4b complex inhibit lung tumor growth, and the targeting ability and therapeutic efficacy of the PA-modified HSA complex was stronger than 4b alone.
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Affiliation(s)
- Jun Wang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Yi Gou
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China.,School of Pharmacy , Nantong University , Nantong , Jiangsu 226000 , China
| | - Zhenlei Zhang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Ping Yu
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Jinxu Qi
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Qipin Qin
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Hongbin Sun
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Xiaoyang Wu
- Ben May Department for Cancer Research , University of Chicago , Chicago , Illinois 60637 , United States
| | - Hong Liang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
| | - Feng Yang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources , Guangxi Normal University , Guilin , Guangxi 541003 , China
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3
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Tan YS, Ooi KK, Ang KP, Akim AM, Cheah YK, Halim SNA, Seng HL, Tiekink ERT. Molecular mechanisms of apoptosis and cell selectivity of zinc dithiocarbamates functionalized with hydroxyethyl substituents. J Inorg Biochem 2015; 150:48-62. [PMID: 26086852 DOI: 10.1016/j.jinorgbio.2015.06.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Revised: 06/03/2015] [Accepted: 06/06/2015] [Indexed: 10/23/2022]
Abstract
In the solid state each of three binuclear zinc dithiocarbamates bearing hydroxyethyl groups, {Zn[S2CN(R)CH2CH2OH]2}2 for R = iPr (1), CH2CH2OH (2), and Me (3), and an all alkyl species, [Zn(S2CNEt2)2]2 (4), features a centrosymmetric {ZnSCS}2 core with a step topology; both 1 and 3 were isolated as monohydrates. All compounds were broadly cytotoxic, specifically against human cancer cell lines compared with normal cells, with greater potency than cisplatin. Notably, some selectivity were indicated with 2 being the most potent against human ovarian carcinoma cells (cisA2780), and 4 being more cytotoxic toward multidrug resistant human breast carcinoma cells (MCF-7R), human colon adenocarcinoma cells (HT-29), and human lung adenocarcinoma epithelial cells (A549). Based on human apoptosis PCR-array analysis, caspase activities, DNA fragmentation, cell apoptotic assays, intracellular reactive oxygen species (ROS) measurements and human topoisomerase I inhibition, induction of apoptosis in HT-29 cells is demonstrated via both extrinsic and intrinsic pathways. Compounds 2-4 activate the p53 gene while 1 activates both p53 and p73. Cell cycle arrest at the S and G2/M phases correlates with inhibition of HT-29 cell growth. Cell invasion is also inhibited by 1-4 which is correlated with down-regulation of NF-κB.
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Affiliation(s)
- Yee Seng Tan
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Kah Kooi Ooi
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Kok Pian Ang
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Abdah Md Akim
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Yoke-Kqueen Cheah
- Department of Biomedical Science, Faculty of Medicine and Health Sciences, University Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia.
| | | | - Hoi-Ling Seng
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia; Department of Biological Sciences, Faculty of Science and Technology, Sunway University, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Edward R T Tiekink
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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4
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Palanimuthu D, Samuelson AG. Dinuclear zinc bis(thiosemicarbazone) complexes: Synthesis, in vitro anticancer activity, cellular uptake and DNA interaction study. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.09.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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5
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Alomar K, Landreau A, Allain M, Bouet G, Larcher G. Synthesis, structure and antifungal activity of thiophene-2,3-dicarboxaldehyde bis(thiosemicarbazone) and nickel(II), copper(II) and cadmium(II) complexes: Unsymmetrical coordination mode of nickel complex. J Inorg Biochem 2013; 126:76-83. [DOI: 10.1016/j.jinorgbio.2013.05.013] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 05/24/2013] [Accepted: 05/24/2013] [Indexed: 11/26/2022]
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6
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Palanimuthu D, Shinde SV, Somasundaram K, Samuelson AG. In Vitro and in Vivo Anticancer Activity of Copper Bis(thiosemicarbazone) Complexes. J Med Chem 2013; 56:722-34. [DOI: 10.1021/jm300938r] [Citation(s) in RCA: 187] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Duraippandi Palanimuthu
- Department
of Inorganic and Physical Chemistry, and ‡Department of Microbiology and
Cell Biology, Indian Institute of Science, Bangalore, India 560012
| | - Sridevi Vijay Shinde
- Department
of Inorganic and Physical Chemistry, and ‡Department of Microbiology and
Cell Biology, Indian Institute of Science, Bangalore, India 560012
| | - Kumaravel Somasundaram
- Department
of Inorganic and Physical Chemistry, and ‡Department of Microbiology and
Cell Biology, Indian Institute of Science, Bangalore, India 560012
| | - Ashoka G. Samuelson
- Department
of Inorganic and Physical Chemistry, and ‡Department of Microbiology and
Cell Biology, Indian Institute of Science, Bangalore, India 560012
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7
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Waghorn PA, Jones MW, Theobald MBM, Arrowsmith RL, Pascu SI, Botchway SW, Faulkner S, Dilworth JR. Shining light on the stability of metal thiosemicarbazonate complexes in living cells by FLIM. Chem Sci 2013. [DOI: 10.1039/c2sc21489j] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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8
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Ali MA, Mirza AH, Mei CC, Bernhardt PV, Karim MR. Template synthesis and X-ray structural characterization of nickel(II) and zinc(II) complexes of tetradentate SNNS ligands formed by condensation of phthalaldehyde with S-methyldithiocarbazate and 4N-methyl-3-thiosemicarbazide. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.10.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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9
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Bis(thiosemicarbazone) copper complexes: mechanism of intracellular accumulation. J Biol Inorg Chem 2012; 18:59-69. [DOI: 10.1007/s00775-012-0949-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 10/10/2012] [Indexed: 02/07/2023]
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10
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Dilworth JR, Hueting R. Metal complexes of thiosemicarbazones for imaging and therapy. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.02.019] [Citation(s) in RCA: 88] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Pascu S, Waghorn P, Kennedy B, Arrowsmith R, Bayly S, Dilworth J, Christlieb M, Tyrrell R, Zhong J, Kowalczyk R, Collison D, Aley P, Churchill G, Aigbirhio F. Fluorescent Copper(II) Bis(thiosemicarbazonates): Synthesis, Structures, Electron Paramagnetic Resonance, Radiolabeling, In Vitro Cytotoxicity and Confocal Fluorescence Microscopy Studies. Chem Asian J 2010; 5:506-19. [DOI: 10.1002/asia.200900446] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Matesanz AI, Souza P. Palladium and platinum 3,5-diacetyl-1,2,4-triazol bis(thiosemicarbazones): Chemistry, cytotoxic activity and structure–activity relationships. J Inorg Biochem 2007; 101:245-53. [PMID: 17097146 DOI: 10.1016/j.jinorgbio.2006.09.024] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Revised: 09/18/2006] [Accepted: 09/18/2006] [Indexed: 11/22/2022]
Abstract
The preparation of platinum(II) complexes derived from 3,5-diacetyl-1,2,4-triazol bis(4-phenylthiosemicarbazone) (H(5)L(1)), 3,5-diacetyl-1,2,4-triazol bis(thiosemicarbazone) (H(7)L(2)), 3,5-diacetyl-1,2,4-triazol bis(4-methylthiosemicarbazone) (H(5)L(3)) and 3,5-diacetyl-1,2,4-triazol bis(4-ethylthiosemicarbazone) (H(5)L(3)) is described. The new complexes [Pt(mu-H(3)L(1))](2), [Pt(mu-H(5)L(2))](2), [Pt(mu-H(3)L(3))](2) and [Pt(mu-H(3)L(4))](2) have been characterized by elemental analyses, fast atom bombardment mass spectrometry (FAB(+)) and spectroscopic studies. The crystal and molecular structure of compounds [Pt(mu-H(3)L(1))](2), parent ligand H(5)L(1) and [Pt(mu-H(3)L(3))](2) have been determined by single crystal X-ray diffraction. The ligands coordinate, in a dideprotonate form to the platinum ions in a new tridentate fashion (NNS) and S-brigding bonding modes. Thus the molecular units of the platinum complexes are stacked as dimers. The testing of the cytotoxic activity of the synthesized compounds together with their palladium analogues against human A2780 and A2780cisR epithelial ovarian carcinoma cells lines suggests that the compounds may be endowed with important antitumor properties since they show IC(50) values in a micromolar range similar to those of cisplatin. The structure and antitumor activity relationships of platinum and palladium complexes are also discussed.
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Affiliation(s)
- Ana I Matesanz
- Departamento de Química Inorgánica, Facultad de Ciencias, Universidad Autónoma de Madrid, C/Francisco Tomás y Valiente 7, 28049 Madrid, Spain
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13
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Holland JP, Aigbirhio FI, Betts HM, Bonnitcha PD, Burke P, Christlieb M, Churchill GC, Cowley AR, Dilworth JR, Donnelly PS, Green JC, Peach JM, Vasudevan SR, Warren JE. Functionalized Bis(thiosemicarbazonato) Complexes of Zinc and Copper: Synthetic Platforms Toward Site-Specific Radiopharmaceuticals. Inorg Chem 2006; 46:465-85. [PMID: 17279826 DOI: 10.1021/ic0615628] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two new types of unsymmetrical bis(thiosemicarbazone) proligands and their neutral zinc(II) and copper(II) complexes have been synthesized. These bifunctional ligands both chelate the metal ions and provide pendent amino groups that can be readily functionalized with biologically active molecules. Functionalization has been demonstrated by the synthesis of three water-soluble glucose conjugates of the new zinc(II) bis(thiosemicarbazonato) complexes, and their copper(II) analogues have been prepared in aqueous solution via transmetalation. A range of techniques including NMR, electron paramagnetic resonance, cyclic voltammetry, high-performance liquid chromatography (HPLC), UV/vis, and fluorescence emission spectroscopy have been used to characterize the complexes. Four compounds, including two zinc(II) complexes, have been characterized by X-ray crystallography. The connectivity and conformation of the glucose conjugates have been assigned by NMR spectroscopy. Time-dependent density functional theory calculations have been used to assign the electronic transitions of the copper(II) bis(thiosemicarbazonato) chromophore. Two copper-64-radiolabeled complexes, including one glucose conjugate, have been prepared and characterized using radio-HPLC, and transmetalation is shown to be a viable method for radiolabeling compounds with copper radionuclides. Preliminary cell washout studies have been performed under normoxic conditions, and the uptake and intracellular distribution have been studied using confocal fluorescence microscopy.
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Affiliation(s)
- Jason P Holland
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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14
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Ahmed IT. Synthesis and Spectroscopic Characterization of Some Divalent Metal Complexes Derived from 1,4-Dibenzoylthiosemicarbazide andN-[2-(3-Benzoylthioureido)ethyl]benzamide. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/104265090970296] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Huang R, Wallqvist A, Covell DG. Anticancer metal compounds in NCI's tumor-screening database: putative mode of action. Biochem Pharmacol 2005; 69:1009-39. [PMID: 15763539 DOI: 10.1016/j.bcp.2005.01.001] [Citation(s) in RCA: 130] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2004] [Accepted: 01/03/2005] [Indexed: 12/12/2022]
Abstract
Clustering analysis of tumor cell cytotoxicity profiles for the National Cancer Institute (NCI)'s open compound repository has been used to catalog over 1100 metal or metalloid containing compounds with potential anticancer activity. The molecular features and corresponding reactivity of these compounds have been analyzed in terms of properties of their metals, their associated organic components (ligands) and their capacity to inhibit tumor cell growth. Cytotoxic responses are influenced by both the identity of the metal and the properties of its coordination ligand, with clear associations between structural similarities and cytotoxicity. Assignments of mechanisms of action (MOAs) for these compounds could be segregated into four broad response classes according to preference for binding to biological sulfhydryl groups, chelation, generation of reactive oxygen species (ROS), and production of lipophilic ions. Correlations between specific cytotoxic responses and differential gene expression profiles within the NCI's tumor cell panel serve as a validation for candidate biological targets and putative MOA classes. In addition, specific sensitivity toward subsets of metal containing agents has been found for certain tumor cell panels. Taken together, our results expand the knowledge base available for evaluating, designing and developing new metal-based anticancer drugs that may provide the basis for target-specific therapeutics.
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Affiliation(s)
- Ruili Huang
- National Cancer Institute at Frederick, Developmental Therapeutics Program, Screening Technologies Branch, Laboratory of Computational Technologies, Frederick, MD 21702, USA
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16
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Matesanz AI, Cuadrado I, Pastor C, Souza P. A Novel Sulfur-bridged Dimeric Zinc(II) Complex with 2, 6-Diacetylpyridine Bis(thiosemicarbazone). Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200400428] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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Synthesis, characterization, crystal structure and electrochemistry of a novel palladium(II) binuclear complex containing 1,2,4-triazole bis(4-phenylthiosemicarbazone) bridges. INORG CHEM COMMUN 2004. [DOI: 10.1016/j.inoche.2004.04.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Gómez-Saiz P, García-Tojal J, Maestro MA, Mahía J, Arnaiz F, Lezama L, Rojo T. New 1,3,4-Oxadiazolecopper(II) Derivatives Obtained from Thiosemicarbazone Complexes. Eur J Inorg Chem 2003. [DOI: 10.1002/ejic.200200689] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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19
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Reddy BK, Kumar JR, Reddy KJ, Sarma LS, Reddy AV. A rapid and sensitive extractive spectrophotometric determination of copper(II) in pharmaceutical and environmental samples using benzildithiosemicarbazone. ANAL SCI 2003; 19:423-8. [PMID: 12675353 DOI: 10.2116/analsci.19.423] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Benzildithiosemicarbazone (BDTSC) is proposed as a sensitive and selective analytical reagent for the extractive spectrophotometric determination of copper(II). BDTSC reacts with copper(II) in the pH range 1.0-7.0 to form a yellowish complex. Beer's law is obeyed in the concentration range 0.5-0.4 microg cm(-3). The yellowish Cu(II)-BDTSC complex in chloroform shows a maximum absorbance at 380 nm, with molar absorptivity and Sandell's sensitivity values of 1.63 x 10(4) dm3 mol(-1) cm(-1) and 0.00389 microg cm(-2), respectively. A repetition of the method is checked by finding the relative standard deviation (RSD) (n = 10), which is 0.6%. The composition of the Cu(II)-BDTSC complex is established as 1:1 by slope analysis, molar ratio and Asmus' methods. An excellent linearity with a correlation coefficient value of 0.98 is obtained for the Cu(II)-BDTSC complex. The instability constant of the complex calculated from Edmond and Birnbaum's method is 7.70 x 10(-4) and that of Asmus' method is 7.66 x 10(-4), at room temperature. The method is successfully employed for the determination copper(II) in pharmaceutical and environmental samples. The reliability of the method is assured by analyzing the standard alloys (BCS 5g, 10g, 19e, 78, 32a, 207 and 179) and by inter-comparison of experimental values, using an atomic absorption spectrometer.
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Affiliation(s)
- B K Reddy
- Analytical Division, Department of Chemistry, Sri Venkateswara University, Tirupathi-517502, India
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20
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Jasinski JP, Bianchani JR, Cueva J, El-Saied FA, El-Asmy AA, West DX. Spectral and Structural Studies of the Copper(II) Complexes of 3, 4-Hexanedione Bis(3-azacyclothiosemicarbazones). Z Anorg Allg Chem 2003. [DOI: 10.1002/zaac.200390032] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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21
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Krishna Reddy B, Rajesh Kumar J, Subramanyam Sarma L, Varada Reddy A. SENSITIVE EXTRACTIVE SPECTROPHOTOMETRIC DETERMINATION OF ZINC(II) IN BIOLOGICAL AND ENVIRONMENTAL SAMPLES USING BENZILDITHIOSEMICARBAZONE. ANAL LETT 2002. [DOI: 10.1081/al-120006676] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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