Sintesis Ester Asam Sinamat Menggunakan Variasi Katalis Asam
DOI:
10.29303/jpm.v15i3.1904Published:
2020-06-09Issue:
Vol. 15 No. 3 (2020): JuniKeywords:
esterification, cinnamic acid, cyclohexanol, phenethyl, alcohol, heterogenous catalyst, nafionArticles
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Abstract
Sintesis ester sinamat dengan mereaksikan asam sinamat dan senyawa-senyawa alkohol telah dilakukan.Tujuan penelitian ini adalah untuk mengetahui kinerja katalis heterogen, nafion, sebagai katalis asam pada sintesis ester-ester sinamat dibandingkan dengan katalis homogen yang lazim digunakan yakni H2SO4 dan p-TsOH. Metode yang digunakan adalah reaksi esterifikasi Fischer yang berlangsung pada suhu 100 oC selama 18 sampai dengan 48 jam. Progres reaksi diikuti menggunakan TLC dan hasil-hasil reaksi dianalisis dengan 1H NMR.Hasil penelitian menunjukkan bahwa penggunaaan sikloheksanol sebagai pereaksi memberikan hasil yang sangat signifikan ketika menggunakan katalis homogen, baik itu H2SO4 maupun p-TsOH dimana lebih dari 85% produk diperoleh. Dengan menggunakan Nafion, sebagai katalis hanyaÃÂ 31% produk berhasil diperoleh apabila menggunakan kondisi yang sama dengan yang diterapkan saat menggunakan katalis homogen. Pada saat reaksi berlangsung lebih lama yaitu 48 jam hasil reaksi meningkat menjadi 78%. Hal yang menarik adalah ketika fenetil ester digunakan sebagai pereaksi menggantikan sikloheksanol, maka hasil yang diperoleh dari ketiga jenis katalis di atas 90%.Hal ini menunjukkan bahwa Nafion adalah katalis heterogen yang cukup menjanjikan untuk digunakan pada reaksi esterifikasi asam sinamat dan turunannya.
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Author Biographies
La Ode Kadidae, Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Halu Oleo Kendari
Ruslin Ruslin, 2Fakultas Farmasi Universitas Halu Oleo Kendari
Laily Nurliana, Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Halu Oleo Kendari
Laode Abdul Kadir, Jurusan Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Halu Oleo Kendari
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