Article Per Year (5 Year)
p-Index From 2021 - 2026
2.083
P-Index
This Author published in this journals
All Journal JURNAL KIMIA SAINS DAN APLIKASI Jurnal S2 Pendidikan Sains Prosiding Pendidikan Sains AGRIVITA, Journal of Agricultural Science Alchemy Jurnal Penelitian Kimia Proceeding of International Conference on Teacher Training and Education Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Kwangsan: Jurnal Teknologi Pendidikan Jurnal Abdi Masyarakat Indonesia Journal Evaluation in Education (JEE) Prosiding SNPBS (Seminar Nasional Pendidikan Biologi dan Saintek) Molekul: Jurnal Ilmiah Kimia Proceeding of International Conference on Biology Education, Natural Science, and Technology
Sentot Budi Rahardjo
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Sebelas Maret University, Kentingan, Surakarta
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Physics Public Health Social Sciences Other

Published : 27 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search
Journal : jurnal kimia sains dan aplikasi

 1 
Synthesis and Antibacterial Testing of Cu(II)-3-Picolylamine Complexes Azizah, Ninna Arifatun Nurul; Hening Citra Dewi, Monica; Rahardjo, Sentot Budi; Marliyana, Soerya Dewi
Jurnal Kimia Sains dan Aplikasi Vol 28, No 5 (2025): Volume 28 Issue 5 Year 2025
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.28.5.267-273

Abstract

The synthesis and characterization of a novel Cu(II)-3-picolylamine complex were successfully carried out, aiming to explore the structural properties and antibacterial potential. The complex was synthesized by reacting CuSO4.5H2O with 3-picolylamine in a 1:4 molar ratio, yielding a dark blue precipitate (78.14% yield). Characterization techniques, including UV-Vis spectroscopy, FTIR, thermal analysis (TG/DTA), magnetic susceptibility, and powder XRD, confirmed the formation of the complex with the proposed formula [Cu(3-picolylamine)4]SO4.5H2O. The complex exhibited a square planar geometry around the Cu(II) ion, coordinated through nitrogen donor atoms of the ligand, with the sulphate ion acting as a counter ion. Thermal analysis revealed a two-stage decomposition process, with the release of five water molecules at 55–130°C and ligand decomposition at higher temperatures. Magnetic susceptibility measurements indicated paramagnetic behaviour with an effective magnetic moment of 1.86 BM, consistent with a d9 configuration. Despite its well-defined structure, the complex showed no antibacterial activity against Staphylococcus epidermidis ATCC 12228 and Pseudomonas aeruginosa ATCC 27853 at all concentrations up to 1000 ppm. The lack of activity was attributed to reduced lipophilicity and the presence of hydrophilic counterions, hindering bacterial cell wall penetration.
The Effect of Fe Pillaring and Mg Intercalating into Bentonite Structure Widjonarko, Dian Maruto; Pramono, Edi; Rahardjo, Sentot Budi; Wahyuningsih, Sayekti; Saraswati, Teguh Endah
Jurnal Kimia Sains dan Aplikasi Vol 29, No 2 (2026): Volume 29 Issue 2 Year 2026
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.29.2.101-110

Abstract

Bentonite clay particles, measuring less than 2 μm, comprise stacked layers of tetrahedral and octahedral units in a 2:1 configuration (T-O-T). These negatively charged layers were subsequently neutralized with cations. However, the exchange or modification of the cation affects its structure and properties. This study investigates the effect of Fe-ion pillaring on the bentonite layer and the intercalation of Mg ions into Fe-pillared bentonite via ion exchange. The materials were characterized using Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM–EDX) to observe surface morphology and elemental composition, Particle Size Analyzer (PSA) to observe average size and size distribution of particle, Fourier-Transform Infrared Spectroscopy (FTIR) to identify the active site and layer structure, and X-ray Diffraction (XRD) to determine their structural and compositional changes. The results confirm the pillaring treatment effect on a higher average particle size of 469.3 nm, with a polydispersity index (PDI) of 0.495, compared to natural bentonite (414.8 nm and 0.586 nm, respectively). Meanwhile, the intercalating treatment showed a lower average particle size of 433.4 nm and a PDI value of 0.613. FTIR identified the silanol and siloxane functional groups, as well as the aluminosilicate layer. Pillaring by Fe2O3 increased the basal spacing of bentonite from 13.6 Å to 17.35 Å, as indicated by the shift of characteristic bentonite peaks to lower 2θ angles. However, intercalation by MgO into Fe-pillared bentonite actually slightly decreased the basal spacing to 15.16 Å. Meanwhile, Mg intercalation occurred within the interlayer of the aluminosilicate layer, resulting in a peak shift toward higher 2θ angles and an increase in crystallinity to 58.924%, compared with Fe-pillared bentonite (45.376%). This phenomenon is likely related to the presence of the Mg metal intercalant, which has basic properties and can attract the aluminosilicate sheets.
Co-Authors A.A. Ketut Agung Cahyawan W Abu Masykur Annur Indra Kusumadani Ari Handono Ramelan Arin Khoirul Hidayah, Arin Khoirul Ashadi Azizah, Ninna Arifatun Nurul Baskoro Adi Prayitno Bramastia, Bramastia Dendy, Dendy Dian Maruto Widjonarko Edi Pramono Eko Sulistiyono, Eko Fajar Rakhman Wibowo Faradilla, Radianita Florentinus Firdiyono Gracia Dian Sidharta, Gracia Dian Hari Hidayatullah, Hari Hening Citra Dewi, Monica Himawan Himawan Isa Anshori Kusumastuti . Lestar, Witri Wahyu Lestari, Witri Wahyu Melin Puspitaningrum Murwani Dewi Wijayanti, Murwani Dewi Naufal, Widyan Muhammad Ngabekti Ngabekti, Ngabekti Nonoh Siti Aminah Nur Asih Siwi Wulandari, Nur Asih Para Mitta Purbosari Prabang Setyono Raen Finnah, Raen Rahmayanti, Lintang Rini, Endah Febri Setiya Sarwanto, S Sayekti Wahyuningsih Soerya Dewi Marliana, Soerya Dewi Soerya Dewi Marliyana Sony Atmojo, Sony Sri Mulyani Sri Widoretno Sri Yamtinah SUKARMIN Sulistyo Saputro Suntoro Suntoro Teguh Endah Saraswati Tri Martini