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The approximate solution to the Schrödinger equation of exotic doubly muonic helium-like systems has been obtained using a simple matrix method based on hydrogenic s-states. Each system considered consists of a positively charged nucleus surrounded by 2 negatively charged muons XZ+μ-μ- (2 Z 36). The present work aims to obtain approximate ground-state energies of the systems and to decompose the energies in terms of the basis states used. Here, the wave function was expressed as a linear combination of 15 eigenfunctions, each written as the product of two hydrogenic s-states. The elements of the Hamiltonian matrix were calculated and finally, the energy eigenvalue equation was numerically solved to obtain the ground-state energies of the systems with their corresponding eigenvectors. From the results, ground-state energies of all systems were in agreement with others from the literature, with percentage differences between 0.03% and 2.05%. The analysis of the probability amplitudes from the eigenvectors showed that the 1s1s state made the largest contribution to the ground state energies of the systems, approaching 90.99%, 96.98% and 98.54% for He2+μ-μ- , Li3+μ-μ- , and Be4+μ-μ- , respectively. Keywords: Doubly muonic helium-like systems, ground state energy, hydrogenic basis states, matrix mechanics, Schrödinger equation

Development of anionic surfactant compound isvery important because the anionic surfactant class iswidely used in people's lives. For instance,anionic surfactantsare used as food additives and detergents. The novelcompound of sulfonate-basedsurfactantor proposed compound has predictedthe CriticalMicelle Concentration(CMC) value of experiment. Quantitative Structure-Property Relationship (QSPR)analysisbased on semiempiricalZINDO/1 calculationwas conducted to obtain QSPR equation. Theoretical predictorsor independent variable which have an influence on the value of CMC are used to construct QSPR equation. The theoretical predictors areclassified intopredictor of electronic properties, solubility and steric. A total of 108experimentalCMCbelongs to sulfonate-basedsurfactant are calculated their theoretical predictors and analyzed by multiple linear regression. The QSPR equationwhich is obtainedfromthis study contains theimportant theoretical predictors.They are solubility properties, molecular weight, molecular size and net charge of carbon atomin thepolar partof sulfonate-based surfactant. This QSPR equation couldbe used to predict the CMC value of the novelsulfonate-based surfactant.

Theoretical study of structure and electronic spectra of a [Ln(pytpy)(NO3)3] complex by quantum Sparkle/RM1 method. Theoretical study of structure and electronic spectra of [Ln(pytpy)(NO3)3] complex (Ln=Eu, Tb, pytpy=4’-(2-pyrrolyl)-2,2’:6’,2”-terpyridine) has been conducted using quantum semiempirical Sparkle/RM1 method. The Sparkle/RM1 method could be used to get the geometry structure of molecule that more stable and structure parameter in the gas phase as simulation of experiment method which too expensive. The calculation of the electronic specra using ZINDO/S method, the sparke is replaced by a point charge +3 along in the positions as determined by Sparkle/RM1 method. Optimized geometri showed that in the complexe [Ln(pytpy)(NO3)3], lanthanide ion is 9-coordinate, being bonded to one tridentate pytpy ligand and three bidentate nitrates.Average distance between lanthanide ion with the N of pytpy ligand is 2,541 Å and 5,14 Å for Eu3+ and Tb3+ respectively. The result of spectroscopic study showed that Sparkle/RM1 method can lead to reliable IR spectra prediction of the ligand and the complexes. UV-Vis spectra of the ligand and the complexes has more intense absorbance and displaying a red shift than UV-Vis spectra of free ligand

Fly ash is an ash with smooth granular shape and black grey color. It is a waste material produced from the burning of coal. The contain of fly ash especially is silica and alumina that it can be used as adsorbent. As adsorbent, fly ash as used to decrease water hardness at Darmakradenan Village, Ajibarang District. The result showed that the porosity of fly ash was 13.6056%, the water content was 0.055%, adsorption capacity of iodium was 216.8975 mg/g, and adsorption capacity of methylen blue was 0,3891 mg/g. Fly ash could decrease total water hardness. The adsorption rise when contact time was added. Adsorption reached equilibrium at contact time 120 minutes with decreasion percentage 63.6363%.

A research on the synthesis of sodium pentagamavunonat (Na-PGV-0) and its stability test using UV-Visible spectrophotometer were carried out. The synthesis of Na-PGV-0 carried out by reacting PGV-0 in tetrahydrofuran solvent refluxed with sodium ethoxide in mol comparison (1:2) for two hours. Structure elucidation by spectroscopic methods using UV-Visible, IR, 1H-NMR, 13C-NMR and stability test in water using UV-Visible spectrophotometer. The reaction yields 107,21 % (% w/w) products. A products was soluble in water and methanol. Structure elucidation results indicated that the formed compound where the OH phenolic of pentagamavunon-0 was replaced by sodium ions. Stability test shows that decreasing of sodium pentagamavunonat to 70,7867 % in 600 minutes storage.