Multicomponent metal-organic framework membranes for advanced functional composites.

The diverse chemical and structural properties of metal-organic frameworks (MOFs) make them attractive for myriad applications, but their native powder form is limiting for industrial implementation. Composite materials of MOFs hold promise as a means of exploiting MOF properties in engineered forms for real-world applications. While interest in MOF composites is growing, research to date has largely focused on utilization of single MOF systems. The vast number of different MOF structures provides ample opportunity to mix and match distinct MOF species in a single composite to prepare multifunctional systems. In this work, we describe the preparation of three types of multi-MOF composites with poly(vinylidene fluoride) (PVDF): (1) co-cast MOF MMMs, (2) mixed MOF MMMs, and (3) multilayer MOF MMMs. Finally, MOF MMMs are explored as catalytic membrane reactors for chemical transformations

MANAJEMEN IMPLEMENTASI KURIKULUM DAN PROSES PEMBELAJARAN

Pembelajaran dengan strategi tematik-integratif untuk MI dan SD. Di madrasah justru memiliki banyak kesempatan untuk menempatkan pembelajaran agama sebagai basis yang terintegrasi dengan mata pelajaran lainnya seperti Bahasa Indonesia, PKN, Kesenian dan Olahraga. Pembelajaran model ini akan lebih menarik dan bermakna bagi siswa, karena model pembelajaran ini menjanjikan tema-tema pembelajaran yang lebih aktual dan kontektual dalam kehidupan sehari-hari. Pembelajaran tematik memiliki peran yang sangat penting dalam meningkatkan perhatian, aktivitas belajar dan pemahaman siswa terhadap materi yang dipelajarinya, karena pembelajarannya lebih berpusat pada siswa, memberikan pengalaman langsung kepada siswa, pisahan mata pelajaran tidak begitu jelas, menyajikan konsep dari berbagai mata pelajaran yang bersifat fleksibel dan hasil pembelajaran dapat berkembang sesuai minat dan kebutuhan siswa. Pembelajaran tematik agar berhasil dengan baik perlu dilakukan dengan menempuh tahapan perencanaan, penerapan dna evaluasi yang terprogram dengan baik.Kata Kunci: Implementasi Kurikulum, Pembelajaran Tematik, Proses Belaja

Precise Control of Molecular Self-Diffusion in Isoreticular and Multivariate Metal-Organic Frameworks.

Understanding the factors that affect self-diffusion in isoreticular and multivariate (MTV) MOFs is key to their application in drug delivery, separations, and heterogeneous catalysis. Here, we measure the apparent self-diffusion of solvents saturated within the pores of large single crystals of MOF-5, IRMOF-3 (amino-functionalized MOF-5), and 17 MTV-MOF-5/IRMOF-3 materials at various mole fractions. We find that the apparent self-diffusion coefficient of N,N-dimethylformamide (DMF) may be tuned linearly between the diffusion coefficients of MOF-5 and IRMOF-3 as a function of the linker mole fraction. We compare a series of solvents at saturation in MOF-5 and IRMOF-3 to elucidate the mechanism by which the linker amino groups tune molecular diffusion. The ratio of the self-diffusion coefficients for solvents in MOF-5 to those in IRMOF-3 is similar across all solvents tested, regardless of solvent polarity. We conclude that average pore aperture, not solvent-linker chemical interactions, is the primary factor responsible for the different diffusion dynamics upon introduction of an amino group to the linker

PENDIDIKAN KARAKTER PADA ANAK USIA DINI DI PAUD ALAM “SAYANG IBU” BANJARMASIN

Pembangunan generasi pembelajaran yang berkarakter, berakhlak mulia, cerdas, kreatif, inovatif, produktif, mandiri, bertanggung jawab, santun dan rendah hati membutuhkan suatu program pembelajaran yang komprehensif, integral dan berkelanjutan. Pelaksanaan pendidikan karakter di PAUD Alam “Sayang Ibu” Banjarmasin yaitu dengan cara  mengintegrasikan nilai-nilai pembentuk karakter yang menjadi prioritas kedalam metode pembelajaran, antara lain metode bermain, bercerita, karya wisata dan bercakap-cakap. Mengem-bangkan kreatifitas anak dengan cara kemandirian dan mengembangkan berbagai potensi anak sejak dini sebagai persiapan untuk hidup, menyesuaikan diri dengan lingkunganya dan menjadikan karakter yang baik melalui sentra,  antara lain sentra bahan alam, sentra bermain peran, sentra balok dan sentra persiapan. Selain melalui kegiatan terprogram, nilai-nilai pendidikan karakter di Paud Alam “Sayang Ibu” Banjarmasin juga dilakukan melalui kegiatan pembiasaan. Kata Kunci: Pendidikan, Karakter, Anak Usia Din

Enhanced photochemical hydrogen production by a molecular diiron catalyst incorporated into a metal-organic framework.

A molecular proton reduction catalyst [FeFe](dcbdt)(CO)6 (1, dcbdt = 1,4-dicarboxylbenzene-2,3-dithiolate) with structural similarities to [FeFe]-hydrogenase active sites has been incorporated into a highly robust Zr(IV)-based metal-organic framework (MOF) by postsynthetic exchange (PSE). The PSE protocol is crucial as direct solvothermal synthesis fails to produce the functionalized MOF. The molecular integrity of the organometallic site within the MOF is demonstrated by a variety of techniques, including X-ray absorption spectroscopy. In conjunction with [Ru(bpy)3](2+) as a photosensitizer and ascorbate as an electron donor, MOF-[FeFe](dcbdt)(CO)6 catalyzes photochemical hydrogen evolution in water at pH 5. The immobilized catalyst shows substantially improved initial rates and overall hydrogen production when compared to a reference system of complex 1 in solution. Improved catalytic performance is ascribed to structural stabilization of the complex when incorporated in the MOF as well as the protection of reduced catalysts 1(-) and 1(2-) from undesirable charge recombination with oxidized ascorbate

Three-Dimensional Phthalocyanine Metal-Catecholates for High Electrochemical Carbon Dioxide Reduction.

The synthesis of a new anionic 3D metal-catecholate framework, termed MOF-1992, is achieved by linking tetratopic cobalt phthalocyanin-2,3,9,10,16,17,23,24-octaol linkers with Fe3(-C2O2-)6(OH2)2 trimers into an extended framework of roc topology. MOF-1992 exhibits sterically accessible Co active sites together with charge transfer properties. Cathodes based on MOF-1992 and carbon black (CB) display a high coverage of electroactive sites (270 nmol cm-2) and a high current density (-16.5 mA cm-2; overpotential, -0.52 V) for the CO2 to CO reduction reaction in water (faradaic efficiency, 80%). Over the 6 h experiment, MOF-1992/CB cathodes reach turnover numbers of 5800 with turnover frequencies of 0.20 s-1 per active site

Effect of synthesis conditions on formation pathways of metal organic framework (MOF-5) Crystals

Metal Organic Frameworks (MOFs) represent a class of nanoporous crystalline materials with far reaching potential in gas storage, catalysis, and medical devices. We investigated the effects of synthesis process parameters on production of MOF-5 from terephthalic acid and zinc nitrate in diethylformamide. Under favorable synthesis conditions, we systematically mapped a solid formation diagram in terms of time and temperature for both stirred and unstirred conditions. The synthesis of MOF-5 has been previously reported as a straightforward reaction progressing from precursor compounds in solution directly to the final MOF-5 solid phase product. However, we show that the solid phase formation process is far more complex, invariably transferring through metastable intermediate crystalline phases before the final MOF-5 phase is reached, providing new insights into the formation pathways of MOFs. We also identify process parameters suitable for scale-up and continuous manufacturing of high purity MOF-5

Metal-organic Framework Supported On Porous Polymer

The growth of continuous MOF membranes on porous polymeric supports is reported, wherein a dip-coating procedure is used to deposit a layer of seed MOF nanocrystals on the surfaces of porous polymers, preferably in the form of hollow fibers, and polycrystalline MOF membranes are subsequently grown at temperatures as low as 65°C. from precursor solutions. The present work opens the road to inexpensive and scalable fabrication of MOF membranes for large-scale separation applications.Georgia Tech Research Corporatio