Near-Infrared Emitting Heterobinuclear Zn-Ln (Ln = Nd, Yb, Er,and Gd) Complexes Based on a Novel Asymmetric Schiff-Base Ligand

Abstract:

With the asymmetric Schiff-base zinc complex ZnL (H₂L = N-(5-bromo-3-methoxysalicylidene)-N'-(5-(4-cyanophenyl)-3-methoxysalicylidene) phenylene-1,2-diamine) as the precursor, a series of heterobinuclear Zn-Ln complexes [ZnLnL(NO₃)₃(CH₃CN)] (Ln = Nd, 1; Ln = Yb, 2; Ln = Er, 3; Ln = Gd, 4) are synthesized by the further reaction with Ln (NO₃)₃·6H₂O, and characterized by FT-IR, FAB-MS and elementary analysis. Photophysical studies of these complexes show that the strong and characteristic NIR luminescence of Nd³⁺, Yb³⁺and Er³⁺ with emissive lifetimes in the microsecond range has been sensitized from the excited state of the asymmetric Schiff-base ligand due to effective intramolecular energy transfer.

• Periodical: Advanced Materials Research (Volume 749)
• Pages: 527-532
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.749.527
• Online since: August 2013
• Authors: Shun Sheng Zhao
• Keywords: Asymmetric, Energy Transfer, Near-Infrared, Schiff-Base Complexes, Sensitization

References

[1] S. Comby, J.C.G. Bünzli, in: Handbook on the Physics and Chemistry of Rare Earths, ed. K. A. Gschneidner Jr, J. -C. G. Bünzli, V. K. Pecharsky, Elsevier Science B. V., Amsterdam, (2007).

DOI: 10.1016/s0168-1273(07)37036-0

[2] J. Kido and Y. Okamoto: Chem. Rev. Vol. 102 (2002), p.2357.

[3] J.C.G. Bünzli and SV Eliseeva: J Rare Earths Vol. 28 (2010), p.824.

[4] J.C.G. Bünzli: Chem. Rev. Vol. 110(2010) p.2729.

[5] Sabbatini N, M. Guardigli and J.M. Lehn: Coord. Chem. Rev. Vol. 123(1993), 201.

[6] J.C.G. Bünzli and C. Piguet: Chem. Soc. Rev. Vol. 34(2005), 1048.

[7] M.D. Ward: Coord Chem Rev Vol. 251(2007), p.1663.

[8] F.F. Chen, Z.Q. Chen, Z.Q. Bian and C.H. Huang: Coord. Chem. Rev. Vol. 254(2010), p.991.

[9] M.D. Ward: Coord Chem Rev Vol. 254(2010), p.2634.

[10] W.K. Lo, W.K. Wong, W.Y. Wong, J.P. Guo, K.T. Yeung, Y.K. Cheng, X.P. Yang and R.A. Jones: Inorg. Chem. Vol. 45(2006), p.9315.

[11] W.Y. Bi, X.Q. Lü, W.L. Chai, J.R. Song, W. -K. Wong, X.P. Yang and R.A. Jones: Z. Anorg. Allg. Chem. Vol. 634(2008), p.1795.

[12] S.S. Zhao, X.Q. Lü, A.X. Hou, W.Y. Wong, W.K. Wong, X.P. Yang and R.A. Jones: Dalton Trans. Vol. 20(2009), p.9595.

[13] X.P. Yang, R.A. Jones, W.K. Wong, M.M. Oye and A.L. Holmes: Chem. Commun. Vol. 45(2006), p.836.

[14] S.S. Zhao, X.R. Liu, W.X. Feng, X.Q. Lü, W.Y. Wong and W.K. Wong: Inorg. Chem. Commun. Vol. 20(2012), p.41.

[15] S.S. Zhao, X.R. Liu, X.Q. Lü, and W.K. Wong: J. Spectrosc. Lett. Vol. 55(1971), p.5464.

[16] S. Akine, T. Taniguchi, S. Masubuchi and T. Nabeshima: J. Org. Chem. Vol. 70(2005), p.1704.

[17] I. Sasaki, D. Pujol and A. Gaudemer: Inorg. Chim. Acta Vol. 134(1987), p.53.

[18] M. Albrecht, O. Osetska, J. Klankermayer, R. Fröhlich, F. Gumy, J.C.G. Bünzli: Chem. Commun. Vol. 43(2007), p.1834.

DOI: 10.1039/b618918k

[19] M.J. Weber: Phys. Rev. Vol. 171(1968), p.283.

[20] J. -C.G. Bünzli In: Lanthanide Probe in life, Chemical and Earth Sciences, Theory and Practice, ed. J. -C.G. Bünzli, G.R. Choppin, Elsievier Science Pub1. B. V. Amsterdam, 1989, ch7, pp.219-93.

[21] W.T. Carnall, P.R. Fields and K. Rajnak: J. Chem. Phys. Vol. 49(1968), p.4443.

[22] D.L. Dexter: J. Chem. Phys. Vol. 21(1953), p.836.

[23] Beeby A, Clarkson IM, Dockins RS, Faulkner S, Parker D, Royle L, De Souda AS, Williams JAG, Woods M: Perkin Trans. Vol. 2(1999), p.493.