Articles

SINTESIS DAN KARAKTERISASI SENYAWA OKSOTRINUKLIR [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) Lesbani, Aldes; Mohadi, Risfidian; Hidayati, Nurlisa
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 2 Juli 2012
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Abstract

The oxotrinuclear compound [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) has been synthesized using RuCl3?nH2O at room temperature under oxygen atmospheric condition. The oxotrinuclear complex was characterized by FT-IR spectrophotometer and mass spectrometer with cold spray ionization (CSI) method. The FT-IR spectra of the resulted oxotrinuclear compound show has specific vibration at 692 cm-1. This absorption is related to M3O vibration (M= metal). CSI-mass spectra of the oxotrinuclear compound show that pyridine as ligand was fragmented in oxotrinuclear compound.
SINTESIS TRIS-(4-THIOANISIL)OKTILSILAN MELALUI REAKSI KOPLING Lesbani, Aldes; Mohadi, Risfidian; ., Eliza; ., Elfita
CHEMISTRY PROGRESS Vol 6, No 2 (2013)
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35799/cp.6.2.2013.3493

Abstract

Telah dilakukan sintesis tris-(4-thioanisil)oktilsilan (1) melalui reaksi kopling antara oktilsilan dengan 4-iodidathioanisol. Reaksi dilakukan menggunakan katalis paladium dalam kondisi atmosfir inert menggunakan pelarut tetrahidrofuran. Senyawa (1) diperoleh dalam bentuk cairan tak berwarna dengan rendemen 20% mempunyai tujuh puncak 1H NMR, tigabelas puncak 13C NMR dan memiliki nilai m/z 510.Synthesis of tris-(4-thioanisyl)octylsilane (1) by coupling reaction between octylsilane and 4-iodo thioanisole has been done. Reaction was carried out using palladium as catalyst in inert condition and tetrahydrofuran as solvent. Compound (1) was obtained in colorless oil with the yield 20% has seven peaks of 1H NMR, thirteen peaks of 13C NMR and m/z 501.
Sintesis Satu Langkah Senyawa Oksotrinuklir dengan Terminal Ligan Piridin [Ru3O(OOCC6H5)6(C5H5N)3]ClO4 Lesbani, Aldes; Mohadi, Risfidian; Eliza, Eliza
Jurnal Kimia Valensi Jurnal Valensi Volume 3, No.2, November 2013
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Syarif Hidayatullah State Islamic Uni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (351.263 KB) | DOI: 10.15408/jkv.v3i2.508

Abstract

Abstrak Telah disintesis senyawa oksotrinuklir dengan terminal ligan piridin [Ru3O(OOCC6H5)6(C5H5N)3]ClO4. Senyawa oksotrinuklir hasil sintesis dikarakterisasi menggunakan spektrofotometer FT-IR dan spektrometer massa. Hasil identifikasi dengan spektrofotometer FT-IR menunjukkan senyawa oksotrinuklir hasil sintesis memiliki vibrasi khas pada bilangan gelombang 698 cm-1. Pengukuran menggunakan spektrometer massa menkonfirmasi bahwa senyawa oksotrinuklir memiliki ligan terminal piridin yang mudah terfragmentasi yang ditandai dengan puncak ion molekul pada m/z 1283,14 dan puncak ion fragmen pada m/z 1205,09 yang mengindikasikan lepasnya satu molekul piridin sebagai terminal ligan. Kata kunci : senyawa oksotrinuklir, sintesis satu langkah, ruthenium, piridin.   Abstract Synthesis of oxotrinuclear with pyridine as terminal ligand [Ru3O(OOCC6H5)6 (C5H5N)3]ClO4 has been carried out. Oxotrinuclear compound from synthesis was characterized using FT-IR spectrophotometer and mass spectrometer. The FTIR spectrum shows that oxotrinuclear compound has vibration at wavelength 698 cm-1 and mass spectrometer spectrum shows oxotrinuclear compound has pyridine as terminal ligand which easily fragmented indicated by molecular ion peak at m/z 1283.14 and ion fragment peak at m/z 1205.09. These values revealed one molecule of pyridine lost from terminal ligand. Keywords : oxotrinuclear compound, one step synthesis, ruthenium, pyridine.
Pillarization of layer double hydroxides (Mg/Al) with keggin type K4[α-SiW12O40]•nH2O and its application as adsorbent of procion red dye Sari, Intan Permata; Said, Muhammad; Lesbani, Aldes
Science and Technology Indonesia Vol 2 No 3 (2017): July
Publisher : ARTS Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (572.562 KB) | DOI: 10.26554/sti.2017.2.3.71-75

Abstract

Pillarization of layered double hydroxides with polyoxometalate K4[α-SiW12O40]•nH2O at various times i.e. 3, 6, 9, 12, 24, 36 and 48 hours has been done. The pillared product was characterized by FT-IR spectrophotometer and XRD. The optimum pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O was used as an adsorbent of procion red dye. The results of characterization using FT-IR spectrophotometer is not yet show the optimum pillarization process. The characterisation using XRD the successfully of pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O showing the existence of diffraction angle 8.5o with intensity 355. Furthermore, the pillared layered double hydroxides of polyoxometalate K4[α-SiW12O40]•nH2O with time variation of 12 hours was applied as an adsorbent of procion red dye. The results show the adsorption rate was 0.523 min-1, the highest of absorption capacity at 70oC was 10.8 mol/g, the highest energy of absorption 70 oC was 125 kJ/mol. The enthalpy (∆H) and entropy (∆S), decrease as the increasing concentration of procion red dye. Keywords: layered double hydroxides, polyoxometalate, pillaration, procion red, adsorption
SINTESIS TRIS(4-METOKSIFENIL)TOLILSILAN DENGAN TEKNIK REAKSI KOPLING MENGGUNAKAN KATALIS PALADIUM TERSIER TRIBUTIL FOSFIN Lesbani, Aldes; Mohadi, Risfidian; Eliza, Eliza
Jurnal Kimia Valensi Jurnal Valensi Volume 3, No.1, Mei 2013
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Syarif Hidayatullah State Islamic Uni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.857 KB) | DOI: 10.15408/jkv.v3i1.332

Abstract

Telah disintesis senyawa tris(4-metoksifenil)tolilsilan (TMT) dengan teknik reaksi kopling menggunakan tolilsilan dan 4-iodida anisol yang dikatalis senyawa paladium. Reaksi dilakukan dalam kondisi inert dan suasana basa. Senyawa TMT hasil sintesis dikarakterisasi menggunakan kromatografi gas-spektrometri massa dan spektrometer 1H dan 13C NMR. Hasil penelitian menunjukkan bahwa senyawa TMT hasil sintesis memiliki rendemen sebesar 30%. Pengukuran menggunakan kromatografi gas-spektrometri massa menghasilkan nilai m/z sebesar 440. Spektrum 1H NMR menunjukkan lima puncak proton ekivalen dan spektrum 13C NMR menghasilkan sepuluh puncak karbon ekivalen. Hasil karakterisasi tersebut bersesuaian dengan struktur senyawa TMT hasil sintesis.   Kata kunci: tris(4-metoksifenil)tolilsilan, reaksi kopling, paladium
PRODUKSI BIODIESEL MELALUI REAKSI TRANSESTERIFIKASI MINYAK JELANTAH DENGAN KATALIS CANGKANG KERANG DARAH (Anadara granosa) HASIL DEKOMPOSISI Lesbani, Aldes; Kurniawati M, Risma; Mohadi, Risfidian
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Volume 1, No. 2, 2013
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

Biodisel telah diproduksi dari minyak jelantah melalui reaksi transesterifikasi menggunakan katalis hasil dekomposisi kerang darah. Kerang darah didekomposisi pada berbagai temperatur dimulai dari 600-1100oC pada kondisi udara terbuka menggunakan furnace.Produk dekomposisi dianalisa menggunakan difraktometer X-Ray.Hasil penelitian menunjukkan temperatur optimum dekomposisi kerang darah terjadi pada temperatur 900oC.Pola XRD produk dekomposisi pada 900 oC mirip dengan pola XRD kalsium oksida standar. Penggunaan katalis hasil dekomposisi untuk produksi biodiesel menghasilkan viskositas dan densitas biodiesel sebesar 5,81 mm2/s dan 0,87 g/cm3. Hasil ini sesuai dengan standar biodiesel dari SNI yakni viskositas dan densitas yang disyaratkan SNI sebesar 2,3-6,0 mm2/s dan 0,85-0,89 g/cm3. Biodiesel was produced from waste cooking oil by transestrification reaction using decomposed cockle shell as catalyst. Cockle shell was decomposed at various temperatures ranging from 600-1100oC in open air condition using furnace. The decomposed product was analyzed using X-Ray diffractometer. The results showed that the optimum temperature for decomposition of cockle shell was at 900 oC. The XRD pattern of decomposed product at 900oC was similar with XRD pattern of calcium oxide standard. The use of decomposed shell to produce biodiesel resulted viscosity and density of biodiesel 5.81 mm2/s and 0.87 g/cm3, respectively. These results are appropriate with biodiesel standard form SNI where the viscosity and density of biodiesel from SNI value were 0.85-0.89 g/cm3 and 2.3-6.0 mm2/s.
Sintesis dan Karakterisasi Senyawa Polyoxometalate H4[Α-Siw12o40] Lesbani, Aldes
Jurnal Penelitian Sains Vol 11, No 1 (2008)
Publisher : Faculty of Mathtmatics and Natural Sciences

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Abstract

Telah dilakukan sintesa dan karakterisasi senyawa polyoxometalate H4[α-SiW12O40] melalui prinsip pertukaran oin menggunakan asam nitrat. Karaktersisasi senyawa polyoxometalate H4[α-SiW12O40] dilakukan dengan menggunakan spektroskopi F-IR, analisis termogravimetri dan 29Si MAS NMR. Spektrum infra merah senyawa polyoxometalate menunjukkan puncak-puncak serapan pada bilangan gelombang 980 cm-1 untuk gugus W = 0,926 cm-1 untuk gugus Si-O,881 cm-1, untuk  gugus W-Oc-W dan 786 cm-1 untuk gugus W-Oe-W. Analisis termogravimetri menunjukkan bahwa adanya 14  molekul air terkristal di dalam senyawa polyoxometalate H4[α-SiW12O40]. Adanya satu puncak pada pergeseran kimia -83 ppm dari analisis menggunakan 29Si MAS NMR menunjukkan bahwa hanya satu atom Si yang ada dalam senyawa polyoxometalate H4[α-SiW12O40].
Studi Kompetisi Interaksi Besi(II) dengan Seng(II) pada Asam Humat Lesbani, Aldes; Yusuf, Setiawati; Iswanti, Yeni
Jurnal Penelitian Sains Vol 16, No 1 (2013)
Publisher : Faculty of Mathtmatics and Natural Sciences

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Abstract

Telah dilakukan studi pemanfaatan asam humat yang diekstraksi dari tanah gambut Muara Kuang untuk kompetisi interaksi besi(II) dan seng(II). Selanjutnya studi interaksi dipelajari dengan menentukan jenis ikatan antara asam humat-besi(II) dan asam humat-seng(II) dengan metode desorpsi berurutan. Hasil peneli-tian menunjukkan bahwa seng(II) terikat lebih banyak dibanding besi(II) pada asam humat dengan konsentrasi awal yang sama. Jumlah seng(II) yang terikat sebesar 96,8% sedangkan besi(II) sebesar 74,6%. Desorpsi beru-rutan besi(II) dan seng(II) pada asam humat menunjukkan kedua kation terikat pada asam humat dengan ika-tan yang didominasi oleh ikatan ionik.
Catalytic Desulfurization of Benzothiophene Using Keggin Type Polyoxometalates as catalyst Lesbani, Aldes; Marpaung, Arianti; Verawaty, Marieska; Amalia, Hesti Rizki; Mohadi, Risfidian
The Journal of Pure and Applied Chemistry Research Vol 4, No 1 (2015)
Publisher : Chemistry Department, The University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (879.702 KB) | DOI: 10.21776/ub.jpacr.2015.004.01.202

Abstract

Performance of catalytic desulfurization of benzothiophen (BT) was studied using polyoxometalates as catalyst. Polyoxometalates H3[a-PW12O40] and  H4[a-SiW12O40], have different heteroatom in Keggin structure and catalytic activities. Polyoxometalates H3[a-PW12O40] and  H4[a-SiW12O40] have high crystallinity with homogeneous distribution particles. Desulfurization of BT using polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40] resulted % conversion up to 99% for 3 h reaction time and at temperature 40 oC. Application of polyoxometalates H3[a-PW12O40] and H4[a-SiW12O40] for crude oil desulfurization showed % conversion of 4-88%. The main functional groups of polyoxometalates still retained after catalytic desulfurization indicated the stability of polyoxometalate compounds
Preparation Calcium Oxide From Chicken Eggshells Mohadi, Risfidian; Anggraini, Kiki; Riyanti, Fahma; Lesbani, Aldes
Sriwijaya Journal of Environment Vol 1, No 2 (2016): Developing Without Destruction
Publisher : Program Pascasarjana Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22135/sje.2016.1.2.32-35

Abstract

Abstract: The preparation of metal oxide CaO from chicken eggshell has been carried out by decomposition at various temperatures 600, 700, 800, 900, and 1000oC. The metal oxide CaO was characterized using XRD. Furthermore, The optimum temperature for preparation of CaO was determined based on the XRD pattern, then the characterization of CaO was extended using FT-IR spectrophotometer and BET analysis. The results show that the optimum temperature for preparation of CaO from chicken eggshell is 900oC with peak of 2Ө at 32.3o, 37.4o, 53.9o, 64.2o and 67.5o, respectively. The FT-IR spectrums show the unique vibration for Ca-O at 393 cm-1. The BET analysis show that CaO has surface area 68 m2/g with pore volume 1.65 cm3/g and pore size 6.6 nm which can be classified as mesoporous.Keywords: eggshell, base catalyst, CaO, BET, mesoporous Abstrak (Indonesian): Pembuatan oksida logam CaO dari cangkang telur ayam telah dilakukan melalui dekomposisi pada berbagai suhu 600, 700, 800, 900, dan 1000°C. Oksida logam CaO dikarakterisasi dengan XRD. Selanjutnya, Suhu optimum untuk persiapan CaO ditentukan berdasarkan pola XRD, setelah itu karakterisasi CaO dilanjutkan menggunakan FT-IR spektrofotometer dan analisis BET. Hasil penelitian menunjukkan bahwa suhu optimum untuk pembentukan CaO dari cangkang telur ayam adalah 900°C dengan puncak 2Ө muncul di 32.3°, 37.4°, 53.9°, 64.2° dan 67.5°. Spektrum FT-IR menunjukkan vibrasi unik untuk Ca-O di 393 cm-1. Analisis dengan BET menunjukkan bahwa CaO memiliki luas permukaan 68 m2/g dengan volume pori 1,65 cm3/g dan ukuran pori 6,6 nm yang dapat diklasifikasikan sebagai mesopori.Kata kunci: kulit telur, katalis basa, CaO, BET, mesopori
Co-Authors A. Agnes, A. Addy Rachmat, Addy Adi Saputra Ahmad Fatoni ANDI WIJAYA Andreas, Roy Andriani Azora Arianti Marpaung Arison Musri Aslihati Aslihati, Aslihati Aslihayati Aslihayati, Aslihayati Benyamin Lakitan Christina, Mikha Meilinda Dedi Rohendi Dian Monariqsa Dormian A N Haloho, Dormian A N Eiffel Ostan Jeski Gultom, Eiffel Ostan Jeski Elfita . Elfita Elfita Eliza . Eliza Eliza Ema Veronika Turnip Eriza Sativa, Eriza Fahma Riyanti, Fahma Fahmariyanti Fahmariyanti Fatmawati Fatmawati Ferlinahayati Ferlinahayati Fitriliana Fitriliana Haris Kriswantoro Hermansyah Hermansyah Hesti A. Harahap, Hesti Hesti Rizki Amalia Hilda Zulkifli Hiroshi Nishihara Hitoshi Kondo intan permata sari Irianty, Yunita Jasantri, Didi Juleanti, Novie Kiki Anggraini, Kiki Leni Sinaga, Leni Lestari Simanjuntak Lora Vitanesa, Lora Lucyanti Lucyanti, Lucyanti Lusi Teresia, Lusi Marieska Verawaty Mariska Verawaty, Mariska MIKSUSANTI MIKSUSANTI Muhammad Imron, Muhammad MUHAMMAD SAID Najma Annuria Fithri, Najma Annuria Narsito Narsito Neza Rahayu Palapa, Neza Rahayu Niken Oktora Normah Normah, Normah Nurlisa Hidayati Oktriyanti, Melantina Melan Palita Tamba Poedji Loekitowati Hariani R.A. Mika Melviana, R.A. Mika Radja Nardo Purba, Radja Nardo Rahayu, Bakri Rio Ramadhan, Jeri Randi O. Saragih, Randi O. Risfidian Mohadi Risma Kurniawati M Samat Samat, Samat Setiawan Yusuf, Setiawan Setiawati Yusuf, Setiawati Setyowati, Menik Sherly Agustina, Sherly Sri Juari Santosa Sueb, Abi Suheryanto Suheryanto, Suheryanto Tarmizi Taher Welinda Me, Welinda Winda Fitriana, Winda Yeni Iswanti, Yeni Yoshinori Yamanoi Yosi Saria Yosine Susi Yosine Susie Zazili Hanafiah