Journal Article

PUBDB-2025-04484

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Transition‐Metal Azo Schiff Base Complexes: Nonlinear Optics Across Solutions, Thin Films and Nanocomposites

Waszkowska, K. (Corresponding author) ; Busch, M.Extern* ; Slassi, S. ; Amine, A. ; El-Ghayoury, A. (Corresponding author) ; Strzelecki, J. ; Zawadzka, A. ; Kityk, A. V. ; Huber, P. (Corresponding author)Extern*DESY* ; Sahraoui, B. (Corresponding author)

2025
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/adom.202500975  doi:10.3204/PUBDB-2025-04484

Abstract: This paper investigates the nonlinear optical (NLO) properties of azo-based Schiff base ligand and its corresponding complexes incorporating Cu(II) and Zn(II) metal cations, designed upon the previous synthesis work. Both 2nd and 3rd order NLO properties are examined, with a particular focus on their potential for optoelectronic and photonic applications. The Z-scan technique is employed to analyze NLO refraction and NLO absorption in solution. All samples exhibit positive NLO phenomena, with Zn(L)2 showing the highest values (χ(3) = 27.95 × 10−22 m2 V−2, γ = 54.44 × 10−47 m5 V−2), attributed to enhanced ligand-to-metal charge transfer (LMCT). Additionally, thin films deposited via the spin coating method undergo 3rd order NLO analysis through the Maker fringe technique. THG analysis further confirms superior 3rd order NLO performance in Zn(L)2, exceeding several benchmark transition-metal complexes. 2nd order NLO properties are also explored in hybrid nanocomposites designed from Zn(L)2 embedded in nanoporous pSiO2 membrane. This structure exhibits anisotropic SHG behavior, with χ(2) = 0.11 pm V−1 under s-p polarization, suggesting polarization confinement within nanochannels. The results clearly demonstrate that transition-metal azo Schiff base complexes, particularly Zn(L)2, exhibit strong NLO responses, positioning them as potential candidates for applications in all-optical switching and frequency conversion.

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Contributing Institute(s):

1. CIMMS-RA Center for integr. Multiscale M (CIMMS)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. TeraHertz - Novel Technologies and Materials for TeraHertz Radiation Control (101086493) (101086493)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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