2-OXIDE-3-BENZALDEHYDE ISONICOTINYLHYDRAZONATO LIGANDS RELATED TO THAT IN THE TITLE COMPLEX, ARE ATTRACTING INTEREST IN THE CONTEXT OF CRYSTAL ENGINEERING ENDEAVOURS [1]. THUS FAR, THE ONLY LEAD ((II)) COMPLEX REPORTED WITH THIS CLASS OF LIGAND IS A BINUCLEAR COMPLEX WHERE THE PYRIDINE-N ATOM DOES NOT PARTICIPATE IN., COORDINATION [2,3]. THE PB ATOM IN THE POLYMERIC TITLE COMPOUND, {[PB(C13H9- N3O2)].CH3OH}N, IS FIVE-COORDINATED. THE COORDINATION GEOMETRY IS BASED ON A TRIGONAL BIPYRAMID WITH THE O ATOMS IN AXIAL POSITIONS. [(C13H9N3O2).CH3OH] LIGANDS RELATED TO THAT IN THE TITLE THIS COMPLEX ARE ATTRACTING INTEREST IN THE CONTEXT OF CRYSTAL ENGINEERING ENDEAVOURS [2].THE THERMAL STABILITY OF COMPOUND BOTH ITS BULK AND NANO-SIZE HAS BEEN STUDIED BY THERMAL GRAVIMETRIC (TG) AND DIFFERENTIAL THERMAL ANALYSES (DTA) AND COMPARED EACH OTHER. CALCINATION WITH AND WITHOUT SURFACTANT OF THE NANO-SIZED COMPOUND AT 400 °C AND 250 °C UNDER AIR ATMOSPHERE YIELDS LEAD ((II)) OXIDE NANOPARTICLES. NANO OXIDE LEAD ((II)) WAS CHARACTERIZED AND ANALYSIED BY SCANNING ELECTRON MICROSCOPY, X-RAY POWDER DIFFRACTION, IR SPECTROSCOPY.

PBO IS AN IMPORTANT FUNCTIONAL MATERIAL HAVING A WIDE RANG APPLICATION IN MAGNETIC RESONANCE AND USE AS MAGNETICE NANO-PARTICLES FOR MAGNETIC DATA STORAGE AND MAGNETIC RESONANCE IMAGING (MRI). THERE IS SOME METHODS FOR PRODUCTION OF THESE NANO-PARTICLES. IN THIS RESEARCH COORDINATION POLYMER, PB (PRO)2, (PRO= PROLINE AMINO ACID) SYNTHESIS BY BRANCHED METHOD AND STRUCTURAL STUDIES OF THIS COMPOUND WAS DONE BY X-RAY CRYSTALLOGRAPHY. THE SINGLE CRYSTAL X-RAY DATA OF COMPOUND SHOWS THAT IS TWO-DIMENSIONAL POLYMER. THE PBO NANOPARTICLES BY THIS COMPOUND HAS BEEN SYNTHESIZED BY CALCINATIONS AT 500°C AND 600°C UNDER AIR ATMOSPHERE. THE MORPHOLOGY OF THESE NANO-PARTICLE IS YELLOW CRYSTALIN SOLID. THIS NANO-STRUCTURES WERE INVESTIGATED BY USING SCANNING ELECTRON MICROSCOPY (SEM), X-RAY POWDER DIFFRACTION (XRD). TEMPERATURE EFFECT ON SIZE AND MORPHOLOGY OF NANO-STRUCTERED COMPOUND HAS BEEN STUDIED. THE THERMAL STABILITY OF BULK COMPOUND WAS STUDIED BY THERMAL GRAVIMETRIC (TG) AND DIFFRACTION THERMAL ANALYSES (DTA).

THE GRACILARIA COLLECTED FROM PERSIAN GULF COAST AND WASHED WITH DISTILLED WATER AND FINALLY POWDERED AFTER DRYING. THE EFFECT OF EXPERIMENTAL PARAMETERS SUCHP H, BIOSORBENT DOSAGE, LEAD ((II)) CONCENTRATIONS AND CONTACT TIME WERE STUDIED (1).IN THE FUTURE, WE HOPE TO INVESTIGATE EFFECTIVE FUNCTIONAL GROUPS ONGRACILARIA ALGAE FOR REMOVAL OF LEAD ((II)). FOR THIS PROPOSE, WE CAN BE USED FTIR ANALYSIS (2), THE OPTIMUM SOLUTION PH FOR MAXIMUM METAL UPTAKE THAT MAY BE RELATED TO THE PKA OF THESE SURFACE GROUPS (2) AND THE TYPE OF KINETIC MODELS THAT FIT WITH OUR DATA (3, 4).WE HOPE TO STUDY THE EFFECT OF TEMPERATURE ON LEAD ((II)) REMOVAL FOR EVALUATING THE THERMODYNAMIC PARAMETERS INCLUDING THE CHANGE IN FREE ENERGY (DGO), ENTHALPY (DHO) AND ENTROPY (DSO) FROM BIOSORPTION STUDY IN SEVERAL TEMPERATURES (3).FINALLY BY USING THE RESPONSE SURFACE MODELING (RSM) THE OPTIMUM CONDITION WITH RESPECT TO THE EXPERIMENTAL PARAMETERS ARE OBTAINED (1).

DURING THE LAST TWO DECADES, THE RATIONAL DESIGN AND SYNTHESES OF NOVEL COORDINATION POLYMERS HAVE MADE CONSIDERABLE PROGRESS IN THE FIELD OF SUPRAMOLECULAR CHEMISTRY AND CRYSTAL ENGINEERING [1]. STRUCTURAL TRANSFORMATIONS WITH THE RETENTION OF SINGLE-CRYSTAL CHARACTER DIRECTLY REFLECT THE RELATIONSHIP BETWEEN THE SOLIDS INVOLVED. STRUCTURAL TRANSFORMATION ALONG WITH ANION-REPLACEMENT IS INTERESTING TYPE OF SOLID STATE REACTIONS [2].

THE DESIGN OF CRYSTAL STRUCTURES AND CONTROL OF MOLECULAR ARRANGEMENTS OF COORDINATION POLYMERS HAS ATTRACTED MUCH ATTENTION IN RECENT YEARS [1], THE COORDINATION CHEMISTRY OF LEAD ((II)) WITH N DONOR LIGANDS HAS BEEN INVESTIGATED IN THE PAST DECADE AND FREQUENTLY DISCUSSED IN REGARD TO THE COORDINATION AND STEREO ACTIVITY OF THE VALENCE SHELL LONE ELECTRON PAIRS [2]. IT SHOULD BE EMPHASIZED THAT THERE ARE DIFFERENT METHODS TO SYNTHESIZE NANO- AND MICRO-CRYSTALLINE METAL OXIDE SUCH AS MICROWAVE-SOLVOTHERMAL SYNTHESIS, HYDROTHERMAL ROUTE AND SURFACTANT LIGAND CO-ASSISTING SOLVOTHERMAL SYNTHESIS [3]. HEREIN WE REPORT THE PREPARATION OF NOVEL 1D POLYMERIC LEAD ((II)) COMPOUND, AND ITS USE IN THE PREPARATION OF PBO NANO-PARTICLES. THE PBO NANOPARTICLES WERE OBTAINED BY THERMOLYSIS OF 1D COORDINATION POLYMER AT 800 °C. THE PBO NANOPARTICLES CHARACTERIZED BY FT-IR, XPRD, AND SEM. THE SEM SHOWS THAT THE SIZE OF THE PBO PARTICLES IS ~30 NM.