Sintesis, Karakterisasi, dan Potensi Pengaplikasian Kompleks Koordinasi Zn(II) sebagai Sensor Fluoresensi
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Abstract
Peningkatan aktivitas industri telah mendorong meningkatnya pencemaran lingkungan oleh ion logam berat, sehingga diperlukan metode analisis yang sensitif, selektif, dan efisien. Sensor fluoresensi berbasis senyawa kompleks logam menjadi alternatif yang menjanjikan dibandingkan metode konvensional seperti AAS dan FTIR yang memiliki keterbatasan biaya dan portabilitas. Jurnal review ini membahas pengembangan dan potensi kompleks koordinasi Zn(II)–8-hidroksikuinolin sebagai sensor fluoresensi, dengan fokus pada aspek sintesis, karakterisasi, mekanisme fluoresensi, serta aplikasinya. Ion Zn(II) dipilih karena konfigurasi elektron d¹⁰ yang bersifat non-quenching, stabil, relatif tidak toksik, dan ramah lingkungan. Ligan 8-hidroksikuinolin berperan sebagai ligan bidentat melalui atom nitrogen dan oksigen, membentuk khelat stabil yang meningkatkan intensitas fluoresensi melalui mekanisme chelation-enhanced fluorescence (CHEF). Review ini menunjukkan bahwa variasi pelarut mempengaruhi efisiensi pembentukan kompleks, yang dibuktikan melalui karakterisasi FTIR dan AAS. Berbagai studi juga mengonfirmasi aplikasi kompleks Zn(II)–8-hidroksikuinolin dalam sensor ion logam, material fluoresen, sistem polimer, hingga aplikasi biomedis dan OLED. Dengan demikian, kompleks ini memiliki potensi besar sebagai material sensor fluoresensi yang sensitif, selektif, dan berkelanjutan
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