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Tuyển tập các báo cáo nghiên cứu khoa học trên tạp chí khoa học vật lý quốc tế đề tài: Protonation and Complexation Approaches for Production of Protic Eutectic Ionic Liquids | Journal of Physical Science Vol. 21 1 15-28 2010 15 Protonation and Complexation Approaches for Production of Protic Eutectic Ionic Liquids Ahmad Adlie Shamsuri and Dzulkefly Kuang Abdullah Laboratory of Industrial Biotechnology Institute of Bioscience Lebuh Silikon Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Corresponding author adlie@putra.upm.edu.my Abstract 4-formyl-N N-dimethylbenzenaminium chloride FDBC carboxymethanami-nium chloride CMAC 1 3-dihydroxy-2- hydroxymethyl propan-2-aminium chloride DHPC R -1-carboxy-2-mercaptoethanaminium chloride CMEC and 1-methyl-2-oxopyrrolidinium chloride MOPC were synthesised and complexed with either urea or oxalic acid at different molar ratios to form protic eutectic ionic liquids PEILs . The melting point of the PEILs was measured using differential scanning calorimetry DSC . Based on the melting point results MOPC complexed with oxalic acid MOPC O at a 1 1 molar ratio and DHPC complexed with urea DHPC U at a 1 2 molar ratio were regarded as room temperature ionic liquids RTILs . The solubility study showed that MOPC O was able to fully dissolve soluble starch and rice starch 10 wt and partially dissolve sago starch. Keywords protic eutectic ionic liquids PEILs hydrochloride salts complexation protic ionic liquids deep eutectic solvent Abstrak 4-formil-N N-dimetilbenzenaminium klorida FDBC karboksimetana minium klorida CMAC 1 3-dihidroksi-2- hidroksimetil propan-2-aminium klorida DHPC R -1-karboksi-2-merkaptoetanaminium klorida CMEC dan 1-metil-2-oksopirrolidi-nium klorida MOPC telah disintesis dan dikomplekskan dengan sama ada urea atau asid oksalik pada nisbah molar berbeza untuk menghasilkan bendalir ionik protik eutektik PEILs . Takat lebur PEILs telah diukur menggunakan kalorimeter imbasan pembezaan DSC . Berdasarkan keputusan takat lebur MOPC yang dikomplekskan dengan asid oksalik MOPC O pada nisbah molar 1 1 dan DHPC yang dikomplekskan dengan urea DHPC U pada nisbah molar 1 2 dianggap
