Department
Chemistry
Major
Chemistry
Research Advisor
Choudhury, Amitava
Advisor's Department
Chemistry
Funding Source
National Science Foundation
Abstract
Aluminosilicate zeolites are highly porous crystalline structures with varying properties. There are hundreds of zeolites with differing pore dimensions and channels, composed of corner-shared AlO4 and SiO4 tetrahedra. Like aluminosilicates, aluminum phosphates also form many zeolitic structures. Syntheses of zeolitic structures are often achieved in the laboratory under hydrothermal or solvothermal conditions in the presence of an organic template, which also acts as a structure directing agent.
Synthesis in high pressure bombs under hydrothermal conditions is often termed as termed as black box where aluminate, silicate, and phosphate precursors in presence of an organic amine at a certain pH spontaneously grow a three-dimensional (3-D) structure with pores and channels. However, the step-by-step building up process from the precursor primary building unit leading up to the 3-D zeolitic structures is still unknown. In this direction, we attempted to discover intermediate phases by employing much milder conditions. Such reactions have enabled us to trap structures that are one-dimensional (1-D) and built up of corner-shared polyhedra. Specifically, we will report synthesis and structure of Al and Zn doped phosphates, Al (HPO4)2[NH4][1,2 DAPH2], AlF(HPO4)(H2PO4)(DMAH2), [DMAH2]3[Zn2 (HPO4)(H2PO4)], and Zn(HPO4)2(Py).
Biography
Our research team has taken on the challenge of synthesizing one-dimensional metal phosphate chains through hydrothermal synthesis. We take raw materials- these being metal salts, strong acids, organic amines and under controlled temperature and volume, are able to grow these complex chains.
After we successfully produce the metal phosphate chains, we characterize them using Powder X-ray and Single-Crystal X-ray diffraction to measure the diffraction of high frequency waves. This shows us the thickness and coordination/shape of the layered/chain structures we produced.
Research Category
Sciences
Presentation Type
Poster Presentation
Document Type
Poster
Award
Sciences – section 1 oral presentation, Second place
Location
Upper Atrium
Presentation Date
14 Apr 2022, 1:30 pm - 3:00 pm
Supramolecular Assembly of Metal Phosphates
Upper Atrium
Aluminosilicate zeolites are highly porous crystalline structures with varying properties. There are hundreds of zeolites with differing pore dimensions and channels, composed of corner-shared AlO4 and SiO4 tetrahedra. Like aluminosilicates, aluminum phosphates also form many zeolitic structures. Syntheses of zeolitic structures are often achieved in the laboratory under hydrothermal or solvothermal conditions in the presence of an organic template, which also acts as a structure directing agent.
Synthesis in high pressure bombs under hydrothermal conditions is often termed as termed as black box where aluminate, silicate, and phosphate precursors in presence of an organic amine at a certain pH spontaneously grow a three-dimensional (3-D) structure with pores and channels. However, the step-by-step building up process from the precursor primary building unit leading up to the 3-D zeolitic structures is still unknown. In this direction, we attempted to discover intermediate phases by employing much milder conditions. Such reactions have enabled us to trap structures that are one-dimensional (1-D) and built up of corner-shared polyhedra. Specifically, we will report synthesis and structure of Al and Zn doped phosphates, Al (HPO4)2[NH4][1,2 DAPH2], AlF(HPO4)(H2PO4)(DMAH2), [DMAH2]3[Zn2 (HPO4)(H2PO4)], and Zn(HPO4)2(Py).
