Serkan DEMİR

Bir Salen Tipi Schiff Bazı ve Zn II Kompleksinin Uyarılmış ve Emisif Hallerinin Ayrıntılı Bir Kıyaslaması ve Modellenmesi: Sentez, Karakterizasyon, Floresans ve TD-DFT Çalışması

hidroksinaftaldehit ve 1,3-diaminopronanın 2:1 kondenzasyonu sonucu simetrik dörtdişli NNOO Schiff bazı ligantı, N,N -bis 2-hidroksi-naftaldimin -2,3-diaminopropan napdap ve ligantın Zn ClO ·6HO ile THF içerisinde 1:1 karıştırılması ile N,N -bis 2-hidroksi-naftaldimin -2,3-diaminopropanato çinko II kompleksi 1 sentezlendi. Bileşiklerin karakterizasyonları Elementel analiz, IR spektroskopisi, Elektro-sprey iyonlaşma kütle spektroskopisi ESI-MS , Termik analiz and iletkenlik ölçümleri ile yapıldı. Bileşiklerin uyarılmış hal ve emisif özellikleri UV-Vis absorpsiyon spektroskopisi ve kararlı hal floresans spektroskopisi teknikleri ile incelendi. Bileşiklerin emisyonlarından sorumlu dikey uyarılma geçişleri daha ayrıntılı olarak ab-initio zamana-bağlı yoğunluk fonksiyonel teorisi çalışmaları ile incelendi

Anahtar Kelimeler:

Floresans spektroskopisi, dört-dişli Schiff bazı, TD-DFT, ESI-kütle spektroskopisi, salen-Zn II compleksi

A Detailed Benchmark and Modeling of the Excited and Emissive States of A Salen Type Tetradentate Schiff Base and Its Zn II Complex: Synthesis, Characterization, Fluorescence and TD-DFT Study

A2:1 condensation of 2-hydroxy naphthaldehyde with 1,3-diaminopropane have resulted symmetrical tet- radentate NNOO Schiff base ligand namely N,N -bis 2-hydroxy-naphthaldimine -2,3-diaminopropane napdap and 1:1 mixing of this ligand with Zn ClO4 2·6H2O in THF yielded the complex N,N -bis 2-hydroxy-naphthaldimine -2,3-diaminopropanato zinc II 1 . Characterizations of the compounds have been carried out by Elemental analyses, IR spectroscopy, Electro-spray ionization mass spectroscopy ESI-MS , Thermal analysis and conductivity measurements. Excited state and emission profiles of the compounds have been investigated by UV-Vis absorbtion spectroscopy and steady state fluorescence spectroscopy techniques. Ver- tical excitations of the compounds responsible for their emissions have been further probed by ab-inito time dependent-density functional theory TD-DFT studies.

Keywords:

Fluorescence spectroscopy, tetradentate Schiff base, TD-DFT, ESI-mass spectroscopy, salen-Zn II complex,

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