NDLI: Synthesis and characterization of substituted Schiff-base ligands and their $d^{10}$ metal complexes: structure-induced luminescence tuning behaviors and applications in co-sensitized solar cells

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Dong, Yu-wei Fan, Rui-qing Zhang, Hui-jie Yang, Yu-lin Wang, Yu-lei Wei, Li-guo Wang, Ping Gao, Song Wang, Xin-ming
Description	Author Affiliation: Dong YW ( Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China. fanruiqing@hit.edu.cn ylyang@hit.edu.cn.)
Abstract	Nine IIB group complexes, $[ZnL_{1}Cl_{2}]$ (Zn1), $[CdL_{1}Cl_{2}]_{2}$ (Cd1), $[HgL_{1}Cl_{2}]$ (Hg1), $[ZnL_{2}Cl_{2}]$ (Zn2), $[CdL_{2}Cl_{2}]$ (Cd2), $[HgL_{2}Cl_{2}]$ (Hg2), $[ZnL_{3}Cl_{2}]$ (Zn3), $[CdL_{3}Cl_{2}]$ (Cd3) and $[HgL_{3}Cl_{2}]$ (Hg3), have been synthesized from the corresponding ortho-(6-methoxy-pyridyl)(CH=NAr) (where Ar = $2,6–iPr_{2}C_{6}H_{3},$ $L_{1};$ $4–MeC_{6}H_{4},$ $L_{2};$ $2–OMeC_{6}H_{4},$ $L_{3})$ Schiff base and structurally characterized by elemental analysis, FT-IR, $^{1}H$ NMR and X-ray single-crystal analysis. Crystallographic studies reveal that the center metal of the complexes adopts a distorted tetrahedron geometry (except for Cd1 and Cd3, which display square pyramidal geometry) and C–H⋯Cl hydrogen bonds and π⋯π stacking interactions contribute to three-dimensional supramolecular structures. The series of complexes exhibit tunable luminescence from blue, through green, to light yellow by varying the temperature (298 K and 77 K), both in solution and in the solid state. Moreover, the quantum yields range from 0.027 to 0.422, and decrease according to the order of the periodic table (Zn > Cd > Hg). These results indicate that the center atom of the complexes leads to the geometry differences and hence to the tunable luminescence properties. Because Zn1–Zn3 exhibited higher molar extinction coefficients and a distinct absorption region, they were employed as co-sensitizers in ruthenium dye N719-sensitized photoanodes to deliver light-electricity efficiency enhancement, being assembled with counter-electrodes and electrolyte to prepare ZnX/N719 (where ZnX = Zn1, Zn2 and Zn3) co-sensitized dye sensitized solar cell (DSSC) devices. The prepared co-absorbent could overcome the deficiency of N719 absorption in the low-wavelength region of the visible spectrum, and offset competitive visible-light absorption of $I_{3}^{−}.$ Application of these prepared complexes in N719-sensitized solar cells enhanced their performance by 10–36%, which indicated a potential application of these types of complexes in DSSCs.
ISSN	14779226
Issue Number	12
Journal	Dalton Trans.
Volume Number	44
e-ISSN	13645447
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-03-28
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Chemistry
Content Type	Text
Resource Type	Article
Subject	Inorganic Chemistry

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