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Metallosupramolecular chemistry deals with coordination compounds consisting of metal ions and organic ligands which form assemblies resembling the ones obtained in classical supramolecular chemistry. Research in this field can be divided in the study of infinite metal-organic frameworks (MOFs) and of finite supramolecular coordination complexes (SCCs). This thesis focuses on a subsection of SCCs: a cage-like metal-organic polyhedra (MOPs). Furthermore, this thesis examines the utilization of cationic ligands, which are far less studies than anionic or neutral ligands.

In the first half of this thesis, Forsblom investigates the design methodologies used in creation of self-assembling coordination cages and details different pathways to acquire MOPs involving two-component, multicomponent and subcomponent systems. Additionally, several examples of how MOPs have been utilized in different applications are shown.

In the second half of the thesis, creation of new supercationic MOPs is described and detailed examination of their crystal structures obtained employing single crystal X-ray crystallography are presented. Overall, structures of 14 cage-like M₆L₈ assemblies, 4 capsule-like M₄L₃ assemblies and one capsule-like M₅L₄ assembly were obtained by pairing cationic tripodal organic ligands and various copper(II), copper(I), nickel(II) and zinc(II) salts. Moreover, post-synthetic modification of these assemblies was studied, providing new insights involving anion exchange in large MOPs. 

The dissertation is published in JYU Dissertations series, number 569, ISBN 978-951-39-9216-3 (PDF), URN:ISBN:978-951-39-9216-3, ISSN 2489-9003. Link to publication:

M.Sc. Samu Forsblom defends his doctoral dissertation “Design and Construction of Metal-Organic Polyhedra” on 11 November 2022 at the Department of Chemistry lecture hall KEM1 at 12 noon. Opponent is Professor Guido Clever (TU Dortmund University, Germany) and Custos Senior Lecturer Manu Lahtinen (Ģ��ֱ��). The doctoral dissertation is held in English.