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A Study of Magnetic Frustration in Copper (II) Adamantoids and Magnetic Tunability in Cobalt (II) Salts.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	A Study of Magnetic Frustration in Copper (II) Adamantoids and Magnetic Tunability in Cobalt (II) Salts./
Author:	Mukda, Benjamin Aaron.
Description:	1 online resource (160 pages)
Notes:	Source: Masters Abstracts International, Volume: 85-11.
Contained By:	Masters Abstracts International85-11.
Subject:	Chemistry. -
Online resource:	click for full text (PQDT)
ISBN:	9798382332178

A Study of Magnetic Frustration in Copper (II) Adamantoids and Magnetic Tunability in Cobalt (II) Salts.
Mukda, Benjamin Aaron.

A Study of Magnetic Frustration in Copper (II) Adamantoids and Magnetic Tunability in Cobalt (II) Salts. - 1 online resource (160 pages)

Source: Masters Abstracts International, Volume: 85-11.

Thesis (M.S.)--Clark University, 2024.

Includes bibliographical references

Investigation of magnetism at the molecular level has yielded many compounds and materials of interest. However, research is still being done on many such compounds to understand how the molecular structure of these compounds affects their magnetic behavior and properties. In this thesis, we present investigations on the magnetic properties of one family of compounds that may display magnetic frustration, and another where intrinsic randomness of the materials may be synthetically controlled.The compounds in these families were synthesized using slow evaporation or reflux techniques. Characterization was performed using IR spectroscopy, elemental analysis, and powder X-ray diffraction (PXRD). Single-crystal X-ray diffraction was used to investigate the structure of these compounds and possible magnetic exchange pathways. Magnetic measurements were performed using a SQUID magnetometer.The first family consists of three new copper(II) complexes with the general formula Cu4X6O(L)4 (1, X = chloride, L = 2-amino-5-chloropyridine) (2, X = chloride, L = 2-amino-5- bromopyridine) (3, X = bromide, L = 2-aminopyridine) with an adamantane-like core structure. 1-2 crystallize in the space group P-1, while 3 crystallizes in the space group P21/c. We also report comparisons between the structures of these compounds and ones found in a literature review of compounds with similar structures and organic ligands. The members of this family all exhibit antiferromagnetic interactions and the possibility of magnetic frustration due to their geometries. The second family consists of five synthetically tunable Co(II) salts with the general formula (2-amino-5-iodopyridinium)2[Co(II)Cl4-xBrx]: (4, (2-amino-5-iodopyridinium)2[CoCl4] 5, (2- amino-5-iodopyridinium)2[CoCl4-xBrx] (x= 0.542 ) 6, (2-amino-5-iodopyridinium)2[CoCl4- xBrx] (x= 2.34 ) 7, (2-amino-5-iodopyridinium)2[CoCl4-xBrx] (x= 3.47 ) 8, (2-amino-5- iodopyridinium)2[CoBr4]). All compounds crystallize in the space group P21/c. Controlling the amount of each halide ion introduced into the reaction mixture can control the relative amounts of chloride ion and bromide ion in the products; variable temperature magnetic susceptibility data indicate the presence of single-ion anisotropy in all compounds. Increasing amounts of bromide ion in the samples lead to measurable antiferromagnetic interactions as well. Additionally, we find that changing the relative amounts of chloride ion and bromide ion changes the anisotropy of the compound.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2024

Mode of access: World Wide Web

ISBN: 9798382332178Subjects--Topical Terms:

593913
Chemistry.
Subjects--Index Terms:

CobaltIndex Terms--Genre/Form:

554714
Electronic books.

A Study of Magnetic Frustration in Copper (II) Adamantoids and Magnetic Tunability in Cobalt (II) Salts.
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500 $a Source: Masters Abstracts International, Volume: 85-11.
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504 $a Includes bibliographical references
520 $a Investigation of magnetism at the molecular level has yielded many compounds and materials of interest. However, research is still being done on many such compounds to understand how the molecular structure of these compounds affects their magnetic behavior and properties. In this thesis, we present investigations on the magnetic properties of one family of compounds that may display magnetic frustration, and another where intrinsic randomness of the materials may be synthetically controlled.The compounds in these families were synthesized using slow evaporation or reflux techniques. Characterization was performed using IR spectroscopy, elemental analysis, and powder X-ray diffraction (PXRD). Single-crystal X-ray diffraction was used to investigate the structure of these compounds and possible magnetic exchange pathways. Magnetic measurements were performed using a SQUID magnetometer.The first family consists of three new copper(II) complexes with the general formula Cu4X6O(L)4 (1, X = chloride, L = 2-amino-5-chloropyridine) (2, X = chloride, L = 2-amino-5- bromopyridine) (3, X = bromide, L = 2-aminopyridine) with an adamantane-like core structure. 1-2 crystallize in the space group P-1, while 3 crystallizes in the space group P21/c. We also report comparisons between the structures of these compounds and ones found in a literature review of compounds with similar structures and organic ligands. The members of this family all exhibit antiferromagnetic interactions and the possibility of magnetic frustration due to their geometries. The second family consists of five synthetically tunable Co(II) salts with the general formula (2-amino-5-iodopyridinium)2[Co(II)Cl4-xBrx]: (4, (2-amino-5-iodopyridinium)2[CoCl4] 5, (2- amino-5-iodopyridinium)2[CoCl4-xBrx] (x= 0.542 ) 6, (2-amino-5-iodopyridinium)2[CoCl4- xBrx] (x= 2.34 ) 7, (2-amino-5-iodopyridinium)2[CoCl4-xBrx] (x= 3.47 ) 8, (2-amino-5- iodopyridinium)2[CoBr4]). All compounds crystallize in the space group P21/c. Controlling the amount of each halide ion introduced into the reaction mixture can control the relative amounts of chloride ion and bromide ion in the products; variable temperature magnetic susceptibility data indicate the presence of single-ion anisotropy in all compounds. Increasing amounts of bromide ion in the samples lead to measurable antiferromagnetic interactions as well. Additionally, we find that changing the relative amounts of chloride ion and bromide ion changes the anisotropy of the compound.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2024
538 $a Mode of access: World Wide Web
650 4 $a Chemistry. $3 593913
650 4 $a Inorganic chemistry. $3 1182077
650 4 $a Materials science. $3 557839
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