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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis The Journal of Pure and Applied Chemistry Research Jurnal Riset Kimia Alchemy Jurnal Penelitian Kimia Science and Technology Indonesia ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis

Maulidan Firdaus

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Sebelas Maret University, Jl. Ir. Sutami 36A Surakarta 57126

Author-ID : 266328

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics

Published : 19 Documents Claim Missing Document

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Articles

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GREEN REDUKSI P- ANISALDEHIDA DAN VANILIN Firdaus, Maulidan; Jumina, Jumina; Anwar, Chairil; Lerrick, Reinner I
Alchemy Jurnal Penelitian Kimia Vol 7, No 1 (2008)
Publisher : Alchemy Jurnal Penelitian Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Sintesis menggunakan prosedur sederhana, efisien energi, dan relatif cepat untuk mereduksiÂ p-anisaldehida dan vanilin berdasarkan prinsip - prinsipÂ green chemistryÂ telah dilakukan. reduksiÂ p-anisaldehida dilakukan dengan cara penggerusanÂ p-anisaldehida dan NaBH4Â dengan jumlah mol yang sama pada pemperatur kamar tanpa pelarut. reduksi vanilin dilakukan dengan NaBH4Â pada temperatur kamar dengan sejumlah kecil pelarut metanol menggunakan mortar dan pestel. penentuan struktur produk reaksi dilakukan dengan metode spektroskopi (IR,Â 1H-NMR, dan GC-MS). pada penelitian ini, reduksiÂ p-anisaldehida dan vanilin menghasilkan 4-metoksibenzil alkohol dan 4-hidroksi-3-metoksibenzil alkohol dngan rendemen berturut-turut sebesar 98% dan 89%.

Synthesis of 2,2,4-Trimethyl-2,3-dihydro-1H-1,5-benzodiazepine using Treated Natural Zeolite Catalyst Maulidan Firdaus; Meyta Dyah Prameswari
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 1 Year 2019 (April 2019)
Publisher : Department of Chemical Engineering - Diponegoro University

The cyclocondensation of 1,2-phenylenediamine and acetone in the presence of treated natural zeolite catalyst (TNZ) under solvent-free condition has been done. The research consisted of three steps. The first step was treatment of natural zeolite by mixing this material in hydrochloric acid solution at 50 °C for 1 hour to be followed by soaking the zeolite in ammonium chloride solution for 5 days. The second step was solvent-free condensation of 1,2-phenylenediamine and acetone using TNZ at 50 °C for 2 hours with weight ratio variation of catalyst, i.e. 15, 30, 45, and 60% (wt/wt). The third step was to study catalyst reusability for the condensation reaction. Based on TLC, FTIR, and 1H NMR analyses, the condensation afforded 2,2,4-trimethyl-2,3-dihydro-1H-1,5-benzodiazepine as the product in 73% yield with the optimum of catalyst loading at 30% (wt/wt). The reusability test showed that the catalyst can be reused for the cyclocondensation for four times.

Reduction of Aldehydes Using Sodium Borohydride under Ultrasonic Irradiation Maulidan Firdaus; Nestri Handayani; Lina Tri Marfu’ah
Indonesian Journal of Chemistry Vol 16, No 2 (2016)
Publisher : Universitas Gadjah Mada

A simple, energy efficient, and relatively quick synthetic procedure for the reduction of aldehydes under ultrasonic irradiation is reported. Satisfactorily isolated yields (71-96%) were achieved confirming that the preparation of alcohol by aldehyde reduction is possible in green and sustainable fashion.

SYNTHESIS OF POLY-5,7-DIALLYL-25,26,27,28-TETRAHYDROXYCALIX[4]ARENE Desi Suci Handayani; Jumina Jumina; Maulidan Firdaus; Triana Kusumaningsih
Indonesian Journal of Chemistry Vol 10, No 1 (2010)
Publisher : Universitas Gadjah Mada

The synthesis of poly-5,7-diallyl-25,26,27,28-tetrahydroxycalix[4]arene were performed in experimental series as follows: (1) Cyclotetramerization of p-t-butylphenol with NaOH and paraformaldehyde to p-butylcalix[4]arene, (2) Debutylation of p-butylcalix[4]arene using AlCl3 and phenol to tetrahydroxycalix[4]arene, (3) Allylation reaction using allylbromide to diallyloxy-dihydroxycalix[4]arene, (4) Claisen rearrangement reaction, (5) Cationic polymerization to diallylcalix[4]arenes. All of the synthesized products were analyzed by means of IR spectrometer and 1H-NMR spectrometer. The result of 25,27-diallyloxy-26,28-dihydroxycalix[4]arene synthesis was white crystals having m.p. 205-207 °C in 80.95% yield. The synthesis of 5,7-diallyl-25,26,27,28-tetrahydroxy-calix[4]arene gave light yellow crystals having m.p. 214-216 °C in 78.67% yield. The polymerization gave poly(5,7-diallyl-25,26,27,28-tetra-hydroxycalix[4]arene) having m.p. 338-340 °C, in 60% yield. Its estimated has a relative molecular weight of 18,738 g/mol with the number of unit repetition about 37 monomer units.

GREEN CHEMISTRY APPLICATION FOR THE SYNTHESIS OF (1)-N-4’-METHOXYBENZYL-1,10-PHENANTHROLINIUM BROMIDE Maulidan Firdaus; Jumina Jumina; Chairil Anwar
Indonesian Journal of Chemistry Vol 8, No 3 (2008)
Publisher : Universitas Gadjah Mada

A simple, energy-efficient, and relatively quick synthetic procedure for the synthesis of (1)-N-4'-methoxybenzyl-1,10-phenanthrolinium bromide, based on green chemistry principles has been carried out. The synthesis was started by solvent-free reduction of p-anisaldehyde with NaBH4 to give 4-methoxybenzyl alcohol in 98% yield to be followed by solvent-free treatment of the resulted alcohol with PBr3 to yield 4-methoxybenzyl bromide (86%). Furthermore, the obtained bromide was reacted with 1,10-phenanthroline in acetone at reflux for 12 h to give the phenanthrolinium salt target in 68% yield.

Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark Surya Dewi Marliyana; Fajar Rakhman Wibowo; Desi Suci Handayani; Triana Kusumaningsih; Venty Suryanti; Maulidan Firdaus; Ema Nur Annisa
Jurnal Kimia Sains dan Aplikasi Vol 24, No 4 (2021): Volume 24 Issue 4 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Stigmasterol and Stigmasterone from Methanol Extract of Calophyllum soulattri Burm. F. Stem Bark. Calophyllum soulattri Burm. F. has been widely used for herbal medicine. Phytochemical investigation of C. soulattri contains a secondary metabolite of the steroid class. Steroid compounds have various biological activities, such as anti-inflammatory, antioxidant, antiproliferative, antibacterial, antimalarial, and anticancer. Two secondary metabolites steroids have been isolated and identified from the stem bark extract of C. soulattri. Isolation was carried out through the extraction (maceration), fractionation, and purification stages. Maceration is carried out using methanol as a solvent. Fractionation was carried out by vacuum liquid chromatography (VLC), and purification was by flash column chromatography. Identification of combined fractions and determination of pure isolates were used through thin-layer chromatography (TLC). The solvent used in the chromatography methods was a mixture of n-hexane and ethyl acetate. The structure isolates were identified by FTIR, 1H NMR, and 13C NMR and compared with literature data. Secondary metabolites steroids that have been isolated are identical compounds to stigmasterol and stigmasterone.

Solvent-less Oxidation of Aromatic Alcohols Using CrO3/Al2O3 under Ultrasonic Irradiation Maulidan Firdaus; Triana Kusumaningsih; Ichsan Arifagama; Zuhdi Alqowamul Amin
Jurnal Kimia Sains dan Aplikasi Vol 25, No 8 (2022): Volume 25 Issue 8 Year 2022
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jksa.25.8.280-285

Alcohol oxidation plays an essential contribution to the chemical industry. Innovative green techniques, such as ultrasound irradiation, could be economically remarkable by enhancing reaction yield. In this research, the design and improvement of a new green ultrasound-assisted oxidation of alcohols procedure using CrO3 supported by Al2O3 with the addition of a small amount of t- butanol were reported. The oxidation of alcohols was also done without ultrasound irradiation to study the sonochemical effect. Based on FTIR and GC/MS analyses, the alcohols were effectively oxidized into their corresponding aldehydes in satisfactory yields (74–93%). The yield of the obtained aldehydes was increased by applying the ultrasonic irradiation technique, and no over-oxidation products were found. Overall, the innovative procedure offers several benefits, such as being easy to use, environmentally friendly, capable of improving yields, and having shorter oxidation times.

Antibacterial Edible Coating from Mandarin Orange Peel (Citrus reticulata) and Moringa Leaf (Moringa oleifera) Extract for Fish Preservation Maulidan Firdaus; Desy Nila Rahmana; Diah Fitri Carolina; Nisrina Rahma Firdausi; Zulfaa Afiifah; Berlian Ayu Rismawati Sugiarto
Jurnal Riset Kimia Vol. 14 No. 1 (2023): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v14i1.563

Approximately 10% of total fish production is wasted due to decomposition. Excessive formalin use in fish preservation can be potentially lethal. One of the natural preservatives is edible coating, which can be prepared from natural ingredients such as mandarin orange peel (Citrus reticulata) pectin and Moringa leaves (Moringa oleifera) which contain antibacterial compounds. The purpose of this research was to examine the antibacterial influence of edible coatings made from pectin of mandarin orange peel with the addition of Moringa leaf extract and to determine its effect on the freshness of nile tilapia (Oreochromis niloticus). Moringa leaf extraction was performed using the Soxhlet extraction method with 96% ethanol at 60–80 °C, while the mandarin orange peel was isolated by reflux using 1% HCl with a pH of 1.5 for 4 hours at 90 °C. Edible coating was synthesized from mandarin orange peel pectin and carboxymethyl cellulose (CMC) which was homogenized with distilled water, and glycerol was added as a plasticizer. Edible coatings were prepared with various concentrations of 0%, 50%, and 100% Moringa leaf extract. Nile tilapia with the addition of edible coatings experienced slower decay, especially in the variations of 100% Moringa leaf extract. This was evidenced by the quantitative test through the Total Plate Count (TPC) test which still did not exceed the limit of >5.6 log CFU/g.

Oxygen Reduction Reaction (ORR) of Pt/C Standard in Different Electrolyte Solutions and Terbium(III) Monoporphyrinato Complex Atmanto Heru Wibowo; Annisa Nur Buana Wati; Anas Santria; Abu Masykur; Maulidan Firdaus
Indonesian Journal of Chemistry Vol 23, No 2 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.78807

Electrocatalytic parameters of a Pt/C standard and a sample of terbium(III) monoporphyrinato were investigated in different solutions. N electron transfer, Tafel slope, Eonset, and overpotential of the catalyst of Pt/C in different solutions were calculated and analyzed using a rotating ring disk electrode (RRDE) in 0.5 M H2SO4, 0.1 M HClO4 and 0.1 M NaOH. In the RRDE measurements, a bipotentiostat at a potential range of 1.03 to 0.05 V vs RHE (Ering = 1.2 V vs RHE) with a scan rate of 5 mV/s and rotation rates of 200, 400, 900, 1600 and 2500 rpm was used. Hereafter, the test of terbium(III) monoporphyrinato compound formulated in [Tb(TPP)(cyclen)]Cl (TPP = 5,10,15,20-tetraphenylporphyrinato; cyclen = 1,4,7,10-tetraazacyclododecane) as a candidate material for ORR electrocatalyst was also done. The results showed that the measurement of Pt/C standards was satisfactory according to the literature for all parameters with the n electron transfer close to 4 in all electrolytes media. [Tb(TPP)(cyclen)]Cl had an n electron transfer value of 2.38, suggesting that the [Tb(TPP)(cyclen)]Cl compound has less potential for ORR catalysts.

The Physicochemical Characterization, Gelatinization Profile, and Proximate Analysis of Sweet Potato Starch (Ipomoea batatas L.) White, Yellow, and Purple Triana Kusumaningsih; Maulidan Firdaus; Fyan Tri Istiqomah Juneasri
Molekul Vol 17 No 2 (2022)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2022.17.2.5186

Sweet potato (Ipomoea batatas L.) has a considerable potency to be developed in Indonesia because of its high nutritional content and spacious application of sweet potato starch in food and non-food fields. Physicochemical characterization, gelatinization profile, and proximate analysis of sweet potato starch white, yellow, and purple has been carried out. Initially, extraction of starch from white, yellow, and purple sweet potato flour was done using a maceration technique. The starch extract was then analysed to determine its physicochemical properties such as pH, density, boiling point, melting point, swelling capacity, and solubility in water, as well as morphological surface using Scanning Electron Microscopy (SEM). The gelatinization profile of sweet potato starch was measured using the Rapid Visco Analyzer (RVA). The proximate composition of sweet potato starch was also determined. The results showed that yellow sweet potato starch has a high amylose content of 28.17% which thus leads to difficulty in absorbing water, increasing the gelatinization temperature and affecting the structural stability of the starch. The molecular structure of amylose and amylopectin is the main factor influencing the determination of the physicochemical characterization of sweet potato starch. Proximate analysis of sweet potato starch showed high content of amylose (28.17%), water (17.03%), and protein (5.21%) with low amylopectin (71.83%), minerals (1.09%), fat (0.09%), and carbohydrates (76.9%) content. The three varieties of sweet potato show extraordinary potential in food industrial applications because they play a huge part in deciding the suitability of sweet potato starch for specific requirements and interest in developing new and remarkable starch sources.

Co-Authors A'yunin, Alfi Rizki Abu Masykur Anas Santria Anggraini, Putri Regita Annisa Istiqomah Annisa Istiqomah, Annisa Annisa Nur Buana Wati Atmanto Heru Wibowo Berlian Ayu Rismawati Sugiarto Chairil Anwar Chairil Anwar Desi Handayani Desi Suci Handayani Desi Suci Handayani Desi Suci Handayani Desy Nila Rahmana Dewi Marliyana, Soerya Diah Fitri Carolina Ema Nur Annisa Fajar Rakhman Wibowo Fajar Rakhman Wibowo Firdausi, Nisrina Rahma Fyan Tri Istiqomah Juneasri Ichsan Arifagama Izati, Zhahira Nur Jumina Jumina Jumina Jumina Lestari, Annisa Firda Lina Tri Marfu’ah Massardi, Adhie Meyta Dyah Prameswari Muhammad Widyo Wartono, Muhammad Widyo Nestri Handayani Ningsih, Dyah A F Nisrina Rahma Firdausi Qurotul Aini Rahayu, Windi Vinata Rahmana, Desy Nila Rakhman Wibowo, Fajar Reinner Ishaq Lerrick Risma Rahmawati Sabella Vegasty Safira Zidna Salama Safitri, Rahmadita Irma Soerya Dewi Marliyana Surya Dewi Marliyana Tahara, Alfia Uke Triana Kusumaningsih Triana Kusumaningsih Triana Kusumaningsih Triana Kusumaningsih Triana Kusumaningsih Vegasty, Sabella Venty Suryanti Venty Suryanti Venty Suryanti Yunita, Ailsa Rahma Zuhdi Alqowamul Amin Zulfaa Afiifah

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