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<p>Herein, the electrochemical, luminescent and potential biological properties of a newly synthesized series of macrocyclic complexes of samarium(III) metal ion are described. Macrocycles, Schiff bases and their complexes with metals display several structural and electronic features that allow their vast applications in diverse research fields especially, in medicinal science. The synthesis of luminescent and electrically active complexes containing (1<i>E</i>,15<i>Z</i>)-3,4,6,7,9,10,12,13,14,16-decahydro-2<i>H</i>-[1, 4, 7]trioxa [11, 14]diaza-cycloheptadecino[12, 13-b]indole scaffold is done <i>via</i> template route using isatin or its derivatives i.e., 5-chloroisatin and 5-bromoisatin, and 1,13-diamino-4,7,10-trioxatri-dacane ligand precursors in the presence of Sm(III)nitrate hexa-hydrate salt. The synthesized complexes are found thermally stable up to ~ 230<sup>o</sup>C and after that started to decompose. The structural characterization is done by the <sup>1</sup>H-NMR, electrospray ionization mass, Fourier transform, and ultraviolet-visible spectroscopy. The proposed structure of these complexes was well-matched by the data. Crystalline nature of the reported complexes is confirmed by the existence of sharp narrow peaks in the X-ray diffraction (XRD). The complexes also found electrically active as the cyclic voltammetry conductivity measured by using DMSO solvent. The complexes displayed characteristic luminescence peaks of Sm(III) at ~ 563, ~602 &amp; ~644&#xa0;nm assigned to <sup>4</sup>G<sub>5/2</sub> →<sup>6</sup>H<sub>5/2</sub>, <sup>4</sup>G<sub>5/2</sub>→ <sup>6</sup>H<sub>7/2</sub>, <sup>4</sup>G<sub>5/2</sub>→ <sup>6</sup>H<sub>9/2</sub> transitions respectively. The biological studies results indicate the remarkable potential of these complexes as antimicrobial and antioxidant agent which may lead the use of these complexes in pharmaceutical field.</p>

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Exploring the electrical and biological aspects of newly synthesized samarium-based macrocyclic complexes with Isatin ligand and it′s derivatives

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Krishna Atal,
  • Sushama Kumari,
  • Krishna Kumar Jhankal,
  • Swati Bugalia

摘要

Herein, the electrochemical, luminescent and potential biological properties of a newly synthesized series of macrocyclic complexes of samarium(III) metal ion are described. Macrocycles, Schiff bases and their complexes with metals display several structural and electronic features that allow their vast applications in diverse research fields especially, in medicinal science. The synthesis of luminescent and electrically active complexes containing (1E,15Z)-3,4,6,7,9,10,12,13,14,16-decahydro-2H-[1, 4, 7]trioxa [11, 14]diaza-cycloheptadecino[12, 13-b]indole scaffold is done via template route using isatin or its derivatives i.e., 5-chloroisatin and 5-bromoisatin, and 1,13-diamino-4,7,10-trioxatri-dacane ligand precursors in the presence of Sm(III)nitrate hexa-hydrate salt. The synthesized complexes are found thermally stable up to ~ 230oC and after that started to decompose. The structural characterization is done by the 1H-NMR, electrospray ionization mass, Fourier transform, and ultraviolet-visible spectroscopy. The proposed structure of these complexes was well-matched by the data. Crystalline nature of the reported complexes is confirmed by the existence of sharp narrow peaks in the X-ray diffraction (XRD). The complexes also found electrically active as the cyclic voltammetry conductivity measured by using DMSO solvent. The complexes displayed characteristic luminescence peaks of Sm(III) at ~ 563, ~602 & ~644 nm assigned to 4G5/2 →6H5/2, 4G5/2→ 6H7/2, 4G5/2→ 6H9/2 transitions respectively. The biological studies results indicate the remarkable potential of these complexes as antimicrobial and antioxidant agent which may lead the use of these complexes in pharmaceutical field.