TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Compound: The ionic substance is chosen from fluorides, chlorides, bromides, iodides, hydroxides, nitrates, sulfates, bisulfates, thiosulfates, phosphates, hydrophosphates, carbonates, bicarbonates, chlorates, bromates, iodates, thiocyanates, cyanides, cyanates, chromates and dichromates, silicates, arsenates, acetates, formates, oxalates, citrates, sulfides, hexafluorophosphates, tetrafluoroborates, tetraphenylborates, molybdates, tungstates, vanadates, phthalates, hydrogen phthalates and terephthalates, and contains cations chosen from ammonium, alkylammonium, hydrogen, lithium, sodium and potassium.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Process: The method further involves heating resulting compounds at 400 degrees C or less under reduced pressure using phosphorus pentoxide as strong dehydrating agent. Preferred Components: The manganese(II) salt is hydrated or anhydrous manganese(II) acetate. The acidic substance is acetic acid. The solvent is chosen from pyridine, N,N-dimethylformamide, N,N-diethylformamide, N,N-dimethylacetamide, dimethyl sulfoxide, N-methylpyrrolidone, dimethyl carbonate, diethyl carbonate, 1-12C alcohol, water, halogenated alkane, acetonitrile and tetrahydrofuran.    TECHNOLOGY FOCUS - POLYMERS - Preparation (claimed): The layered MOF-type coordination polymer of manganese (I) is obtained by condensing isonicotinic acid hydrazide with lower ketone or aldehyde, 1-6C aliphatic and/or aromatic under anaerobic or aerobic conditions or in air and then adding acidic substance and salt of manganese(II) to the system to deprotect resulting hydrazide-hydrazone. EXAMPLE - 274 mg Isonicotinic acid hydrazide was dissolved in 40 mL 92% ethanol containing 700 mu L acetone and heated under reflux for 10 minutes or less. Then, 80% 215 mu L acetic acid and 245 mg manganese (II) acetate tetrahydrate were added, resulting pale yellow solution was refluxed for 10 minutes or less. Then, the solution was allowed to standstill for 6 days, crystallized, dark yellow crystals were filtered, washed with ethanol and dried in air at room temperature, to obtain 200 mg layered MOF-type coordination polymer of manganese of formula: ((Mn2(ina)4(H2O)2).2EtOH)n with yield of 55%.    ina=isonicotinic acid anion;and    n=polymeric structural unit.