Fluorometric chemosensors. Interaction of toxic heavy metal ions PbII, CdII, and HgII with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies

M. Carla Aragoni; Massimiliano Arca; Francesco Demartin; Francesco A. Devillanova; Francesco Isaia; Alessandra Garau; Vito Lippolis; Fahimeh Jalali; Ulrich Papke; Mojtaba Shamsipur; Lorenzo Tei; Abdollah Yari; Gaetano Verani

doi:10.1021/ic020270d

Fluorometric chemosensors. Interaction of toxic heavy metal ions Pb^II, Cd^II, and Hg^II with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies

M. Carla Aragoni, Massimiliano Arca, Francesco Demartin, Francesco A. Devillanova, Francesco Isaia, Alessandra Garau, Vito Lippolis, Fahimeh Jalali, Ulrich Papke, Mojtaba Shamsipur, Lorenzo Tei, Abdollah Yari, Gaetano Verani

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

Abstract

The macrocycles L¹-L³ incorporating N₂S₃-, N₂S₂O-, and N₂S₂-donor sets, respectively, and containing the 1,10-phenanthroline unit interact in acetonitrile solution with heavy metal ions such as Pb^II, Cd^II, and Hg^II to give 1:1 ML, 1:2 ML₂, and 2:1 M₂L complex species, which specifically modulate the photochemical properties of the ligands. The stoichiometry of the complex species formed during spectrofluorometric titrations and their formation constants in MeCN at 25 °C were determined from fluorescence vs M^II/L molar ratio data. The complexes [Pb(L¹)][ClO₄]₂· 1/2H₂O (1), [Pb(L²)][ClO₄]2·MeNO₂ (1a), [Pb(L³)₂][ClO₄]₂·2MeCN (1b), and [Cd(L³)][NO₃]₂ (2b) were also characterized by X-ray diffraction studies. The conformation adopted by L¹-L³ in these species reveals the aliphatic portion of the rings folded over the plane containing the heteroaromatic moiety with the ligands trying to encapsulate the metal center within their cavity. In 1, 1a, and 2b the metal ion completes the coordination sphere by interacting with counteranion units and solvent molecules. On the contrary, the 1:2 complex 1b shows Pb^II sandwiched between two symmetry-related molecules of L3 reaching an overall [4N + 4S] eight-coordination.

Lingua originale	Inglese
pagine (da-a)	6623-6632
Numero di pagine	10
Rivista	Inorganic Chemistry
Volume	41
Numero di pubblicazione	25
DOI	https://doi.org/10.1021/ic020270d
Stato di pubblicazione	Pubblicato - 16 dic 2002
Pubblicato esternamente	Sì

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10.1021/ic020270d

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Aragoni, M. C., Arca, M., Demartin, F., Devillanova, F. A., Isaia, F., Garau, A., Lippolis, V., Jalali, F., Papke, U., Shamsipur, M., Tei, L., Yari, A., & Verani, G. (2002). Fluorometric chemosensors. Interaction of toxic heavy metal ions Pb^II, Cd^II, and Hg^II with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies. Inorganic Chemistry, 41(25), 6623-6632. https://doi.org/10.1021/ic020270d

@article{2cf88fd9cf164871b89106b2a514097c,

title = "Fluorometric chemosensors. Interaction of toxic heavy metal ions PbII, CdII, and HgII with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies",

abstract = "The macrocycles L1-L3 incorporating N2S3-, N2S2O-, and N2S2-donor sets, respectively, and containing the 1,10-phenanthroline unit interact in acetonitrile solution with heavy metal ions such as PbII, CdII, and HgII to give 1:1 ML, 1:2 ML2, and 2:1 M2L complex species, which specifically modulate the photochemical properties of the ligands. The stoichiometry of the complex species formed during spectrofluorometric titrations and their formation constants in MeCN at 25 °C were determined from fluorescence vs MII/L molar ratio data. The complexes [Pb(L1)][ClO4]2· 1/2H2O (1), [Pb(L2)][ClO4]2·MeNO2 (1a), [Pb(L3)2][ClO4]2·2MeCN (1b), and [Cd(L3)][NO3]2 (2b) were also characterized by X-ray diffraction studies. The conformation adopted by L1-L3 in these species reveals the aliphatic portion of the rings folded over the plane containing the heteroaromatic moiety with the ligands trying to encapsulate the metal center within their cavity. In 1, 1a, and 2b the metal ion completes the coordination sphere by interacting with counteranion units and solvent molecules. On the contrary, the 1:2 complex 1b shows PbII sandwiched between two symmetry-related molecules of L3 reaching an overall [4N + 4S] eight-coordination.",

author = "Aragoni, {M. Carla} and Massimiliano Arca and Francesco Demartin and Devillanova, {Francesco A.} and Francesco Isaia and Alessandra Garau and Vito Lippolis and Fahimeh Jalali and Ulrich Papke and Mojtaba Shamsipur and Lorenzo Tei and Abdollah Yari and Gaetano Verani",

year = "2002",

month = dec,

day = "16",

doi = "10.1021/ic020270d",

language = "English",

volume = "41",

pages = "6623--6632",

journal = "Inorganic Chemistry",

issn = "0020-1669",

publisher = "American Chemical Society",

number = "25",

}

Aragoni, MC, Arca, M, Demartin, F, Devillanova, FA, Isaia, F, Garau, A, Lippolis, V, Jalali, F, Papke, U, Shamsipur, M, Tei, L, Yari, A & Verani, G 2002, 'Fluorometric chemosensors. Interaction of toxic heavy metal ions Pb^II, Cd^II, and Hg^II with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies', Inorganic Chemistry, vol. 41, n. 25, pagg. 6623-6632. https://doi.org/10.1021/ic020270d

Fluorometric chemosensors. Interaction of toxic heavy metal ions Pb^II, Cd^II, and Hg^II with novel mixed-donor phenanthroline-containing macrocycles: Spectrofluorometric, conductometric, and crystallographic studies. / Aragoni, M. Carla; Arca, Massimiliano; Demartin, Francesco et al.
In: Inorganic Chemistry, Vol. 41, N. 25, 16.12.2002, pag. 6623-6632.

Risultato della ricerca: Contributo su rivista › Articolo in rivista › peer review

TY - JOUR

T1 - Fluorometric chemosensors. Interaction of toxic heavy metal ions PbII, CdII, and HgII with novel mixed-donor phenanthroline-containing macrocycles

T2 - Spectrofluorometric, conductometric, and crystallographic studies

AU - Aragoni, M. Carla

AU - Arca, Massimiliano

AU - Demartin, Francesco

AU - Devillanova, Francesco A.

AU - Isaia, Francesco

AU - Garau, Alessandra

AU - Lippolis, Vito

AU - Jalali, Fahimeh

AU - Papke, Ulrich

AU - Shamsipur, Mojtaba

AU - Tei, Lorenzo

AU - Yari, Abdollah

AU - Verani, Gaetano

PY - 2002/12/16

Y1 - 2002/12/16

N2 - The macrocycles L1-L3 incorporating N2S3-, N2S2O-, and N2S2-donor sets, respectively, and containing the 1,10-phenanthroline unit interact in acetonitrile solution with heavy metal ions such as PbII, CdII, and HgII to give 1:1 ML, 1:2 ML2, and 2:1 M2L complex species, which specifically modulate the photochemical properties of the ligands. The stoichiometry of the complex species formed during spectrofluorometric titrations and their formation constants in MeCN at 25 °C were determined from fluorescence vs MII/L molar ratio data. The complexes [Pb(L1)][ClO4]2· 1/2H2O (1), [Pb(L2)][ClO4]2·MeNO2 (1a), [Pb(L3)2][ClO4]2·2MeCN (1b), and [Cd(L3)][NO3]2 (2b) were also characterized by X-ray diffraction studies. The conformation adopted by L1-L3 in these species reveals the aliphatic portion of the rings folded over the plane containing the heteroaromatic moiety with the ligands trying to encapsulate the metal center within their cavity. In 1, 1a, and 2b the metal ion completes the coordination sphere by interacting with counteranion units and solvent molecules. On the contrary, the 1:2 complex 1b shows PbII sandwiched between two symmetry-related molecules of L3 reaching an overall [4N + 4S] eight-coordination.

AB - The macrocycles L1-L3 incorporating N2S3-, N2S2O-, and N2S2-donor sets, respectively, and containing the 1,10-phenanthroline unit interact in acetonitrile solution with heavy metal ions such as PbII, CdII, and HgII to give 1:1 ML, 1:2 ML2, and 2:1 M2L complex species, which specifically modulate the photochemical properties of the ligands. The stoichiometry of the complex species formed during spectrofluorometric titrations and their formation constants in MeCN at 25 °C were determined from fluorescence vs MII/L molar ratio data. The complexes [Pb(L1)][ClO4]2· 1/2H2O (1), [Pb(L2)][ClO4]2·MeNO2 (1a), [Pb(L3)2][ClO4]2·2MeCN (1b), and [Cd(L3)][NO3]2 (2b) were also characterized by X-ray diffraction studies. The conformation adopted by L1-L3 in these species reveals the aliphatic portion of the rings folded over the plane containing the heteroaromatic moiety with the ligands trying to encapsulate the metal center within their cavity. In 1, 1a, and 2b the metal ion completes the coordination sphere by interacting with counteranion units and solvent molecules. On the contrary, the 1:2 complex 1b shows PbII sandwiched between two symmetry-related molecules of L3 reaching an overall [4N + 4S] eight-coordination.

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U2 - 10.1021/ic020270d

DO - 10.1021/ic020270d

M3 - Article

SN - 0020-1669

VL - 41

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

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