Yeni Eu(III) kompleksinin sentezlenmesi ve fotofiziksel özellikleri

Yıl 2017, Cilt: 19 Sayı: 3, 7 - 15, 07.12.2017

Mustafa Burak Coban

https://doi.org/10.25092/baunfbed.363733

Cited By: 3

Öz

Bu çalışmada, oksijen donör ligandı kullanılarak yeni Eu(III) içeren
lantanit kompleksi hidrotermal yöntem ile sentezlenmiş ve tek kristal X-ışını
kırınımı, element analizi, katı UV-Vis spektroskopisi, FT-IR ve fotolüminesans
özellikleri ile karakterize edilmiştir. 
Eu(III) kompleksinin [C₇H₉EuO₉S](1) kristal yapısı sekiz oksijen atomu
ile koordine olduğunu göstermektedir. 
Burada altı oksijen atomu ssa^- anyonik ligandından ve iki
oksijen atomu ise koordine su moleküllerinden gelmektedir.  Kompleks 1,
ssa^- ligandının karboksil ve sülfonat grupları ile köprü kurarak
bir-boyutlu zincir oluşturmaktadır.  Bir
boyutlu zincirler ssa^- ligandları ile birlikte iki-boyutlu dalga
benzeri tabakalar oluşturaktadır.  Tüm bu
dalga benzeri tabakalar güçlü hidrojen bağı etkileşimleri üç-boyutlu mimari ile
sonuçlanmıştır. Buna ek olarak, kompleks (1)’
in katı durum fotolüminesans özellikleri oda sıcaklığında araştırılmıştır.
Kompleks için anten etkisi ile dolaylı enerji transfer mekanizması detaylı
olarak araştırılmıştır.

Anahtar Kelimeler

Eu(III) kompleksi, kristal yapı, anten etkisi

Synthesis and photophysical properties of new Eu(III) complex

Öz

In this study, the
new Eu(III) complex was hydrothermally
synthesized using oxygen donor ligand and characterized by single crystal X-ray
diffraction, elemental analysis, solid UV-Vis spectroscopy, FT-IR and
photoluminescence properties.  The
crystal structure analysis of complex [C₇H₉EuO₉S](1) indicates that the central
lanthanide ions are coordinated by eight oxygen atoms in which six oxygen atoms from four ssa^- anionic ligands and two oxygen atoms from a
coordinated water molecules.  Complex 1
bridged by oxygen atoms from carboxyl and sulfonate groups of the ssa^-
ligands are formed in 1D chains.  The 1D
chains are linked together with ligand ssa^- to form a 2D wave-like
layers.  All these wave-like layers are
further interlinked via strong hydrogen bonding interaction resulting in 3D
architecture.  Additionally, solid state
photoluminescence properties of complex 1
have been investigated in room temperature. 
The indirect energy transfer mechanism via an Antenna effect in complex 1 has been investigated in detail.

Anahtar Kelimeler

Eu(III) complex, crystal structure, antenna effect

Kaynakça

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