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Dergiler / Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi / 2025 / Cilt: 29 Sayı: 3

Polar Uç Gruplara Sahip Yeni Üç-Halkalı Kalkon-İmin Türevlerinin Sentezi, Yapısal ve Mesomorfik Karakterizasyonu

Synthesis, Structural and Mesomorphic Characterization of New Three-Ring Chalcone-Imine Derivatives with Polar End Groups

Ceren Can Karanlık(YILDIZ TEKNİK ÜNİVERSİTESİ, FEN-EDEBİYAT FAKÜLTESİ)0000-0002-4821-5313
Sayfa
657–664
Yayın Tarihi
2025-12-25
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Türevlerin mesomorfik davranışları diferansiyel taramalı kalorimetri (DSC) ve polarize optik mikroskop (POM) ile gözlemlenmiştir.

📌 3 Maddede Bu Makale

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Amaç & Hipotez:Bu çalışmada, uç pozisyonlardan birinde n-dodesiloksi grubu, diğerinde ise siyano veya brom grubu bulunan üç-benzen-halkalı merkezi üniteden oluşan yeni kalkon-imin türevleri sentezlenmiştir.
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Temel Bulgular & Veri:Elde edilen türevlerin kimyasal yapıları spektral analizlerle (1H-, 13C/APT-NMR ve FT-IR) aydınlatılmıştır.
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Sonuç & Katkı:Türevlerin mesomorfik davranışları diferansiyel taramalı kalorimetri (DSC) ve polarize optik mikroskop (POM) ile gözlemlenmiştir.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Sıvı kristaller · Kalkon-imin türevleri · Mesomorfik davranış

Özet

Bu çalışmada, uç pozisyonlardan birinde n-dodesiloksi grubu, diğerinde ise siyano veya brom grubu bulunan üç-benzen-halkalı merkezi üniteden oluşan yeni kalkon-imin türevleri sentezlenmiştir. Elde edilen türevlerin kimyasal yapıları spektral analizlerle (1H-, 13C/APT-NMR ve FT-IR) aydınlatılmıştır. Türevlerin mesomorfik davranışları diferansiyel taramalı kalorimetri (DSC) ve polarize optik mikroskop (POM) ile gözlemlenmiştir. Siyano-uçlu kalkon-imin türevinin (3a) 19 ˚C termal sıcaklık aralığı ile karakterize edilen enansiyotropik SmA mesofazını ve ayrıca M mesofazını sergilerken, brom-uçlu kalkon-imin türevinin (3b) ise herhangi bir mesomorfik davranış göstermediği belirlenmiştir. Bu sonuç, polar uç grubunun türü ve doğasının moleküllerin sıvı kristal özelliklerini büyük ölçüde etkilediğini vurgulamaktadır.

Abstract

In this study, new chalcone-imine derivatives composed of three-benzene-ring central unit containing n-dodecyloxy group at one end and cyano or bromo group at other end have been synthesized. Chemical structures of the obtained derivatives have been clarified by spectral analyses (1H-, 13C/APT-NMR and FT-IR). The mesomorphic behaviour and optical textures of the derivatives have been observed by differential scanning calorimetry (DSC) and polarized optical microscopy (POM). It was determined that cyano-terminated chalcone-imine derivative (3a) exhibits enantiotropic SmA mesophase, characterized by thermal range of 19 ˚C and also a M mesophase, while bromo-terminated chalcone-imine derivative (3b) does not show any mesomorphic behaviour. This result emphasizes that the type and the nature of the polar end group has a huge impact on the liquid crystalline properties of the molecules.

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Bu Makaleye Atıf Yap

Karanlık, C. C. (2025). Polar Uç Gruplara Sahip Yeni Üç-Halkalı Kalkon-İmin Türevlerinin Sentezi, Yapısal ve Mesomorfik Karakterizasyonu. Süleyman Demirel Üniversitesi Fen Bilimleri Enstitüsü Dergisi, Cilt: 29 Sayı: 3, 657–664. https://doi.org/10.19113/sdufenbed.1797499

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