Adem DÖNMEZ, Uğur ERKARSLAN, Şehmuz KARADENİZ

[Eu(1,2,4-BTC)], (1,2,4-BTC=1,2,4- benzen trikarboksilik asit) koordinasyon polimerinin kristal yapı ve optik özelliklerinin araştırılması

Metal kümelerden ve organik bağlayıcılarından oluşan gözenekli koordinasyon polimerleri foto-problar, organik ışık yayan diyotlar, sensörler, foto-katalizöterler ve diğer ışık yayımlayabilen aygıtlar gibi çeşitli geniş uygulama alanlarıyla yeni sınıf bir malzeme olarak malzeme bilimine umut vermektedir. Gözenekli koordinasyon polimerlerinin özelliklerinin, organik moleküller ile bağlantılı yapı taşlarını orantılı bir biçimde tasarlarken sıklıkla değiştiği gözlemlenmiştir. Bu nedenle özel olarak sentezlenebilen yeni malzemeler ile yeni uygulama alanları keşfedilebilmekte ve bunların özellikleri geliştirilebilmektedir. Bu çalışmada; yeni Eu(III) içeren gözenekli koordinasyon polimeri; [Eu(1,2,4-BTC)], (1,2,4-BTC=1,2,4- Benzen trikarboksilik asit) hidrotermal yöntem ile sentezlenmiş ve toz kristal X-ışını kırınımı, katı hal UV ve FT-IR spektroskopisi teknikleri ile yapısal olarak karakterize edilmiştir. Ayrıca oda sıcaklığında katı-hal fotolüminesans (PL) özellikleri görünür bölge ve yakın kızıl ötesi bölgede ölçülmüş ve serbest liganddan elde edilen PL ölçümüyle karşılaştırılmıştır. Sentezlenen malzeme NIR bölgede karakteristik şiddetli lüminesans özelliğe sahip olduğu için optik haberleşme, medikal teşhis ve diğer birçok teknolojik alanda potansiyel uygulama alanına sahip olabilir.

Investigation of crystal structure and optical properties of [Eu(1,2,4-BTC)], (1,2,4-BTC=1,2,4-benzenetricarboxylic acid) coordination polymer

Porous coordination polymers composed of metal clusters and organic binders have promised material science as a new class material with a wide range of applications such as photo-probes, organic light emitting diodes, sensors, photo-catalysis and other light emitting devices. It has been observed that the properties of porous coordination polymers frequently change when designing building blocks that are highly related to manipulative organic molecules. Therefore, the novel materials can be specifically synthesized for improving properties and discovering new applications. In this study, a new porous coordination polymer containing Eu-(III): [Eu(1,2,4-BTC)], (1,2,4-BTC=1,2,4- Benzenetricarboxylic acid) were synthesized by hydrothermal method and characterized by powder X-ray diffraction, solid state UV and FT-IR spectra. In addition, the solid-state photoluminescence (PL) properties at room temperature were measured in the visible region and near infrared region and compared with the PL measurement of its free ligand. Since the synthesized material has the characteristic strong luminescence properties in the NIR region, there could have many potential applications in optical communication, medical diagnosis and many other technological fields.

Keywords:

Luminescence, porous coordination polymer, Europium,

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