{"id":{"repo_id":"buffalo","oai_identifier":"oai:ubir.buffalo.edu:10477/86778"},"canonical_url":"https://search.dev.ndltd.org/etd/buffalo/oai:ubir.buffalo.edu:10477/86778","repository":{"repo_id":"buffalo","name":"Buffalo","base_url":"https://ubir.buffalo.edu/oai/request"},"display":{"title":"Attaching CdSe Quantum Dots to TiO2 Using Ligands with Phosphonic and Hydroxamic Acid Anchoring Groups: A Study of Persistence and Electron Transfer","abstract":"M.S.","abstract_html":"M.S.","abstract_has_math":false,"creators":["Schmidt, Zachery"],"institution":"State University of New York at Buffalo","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Watson, David","Chemistry"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2025,"date_issued":"2025-02-21T21:44:59Z","date_published":"2025-02-21T21:44:59Z","updated_at":"2026-07-27T19:05:37Z","subjects":["chemistry"],"languages":["eng"],"rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/10477/86778","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Watson, David","Chemistry"]},{"key":"dc:creator","label":"Author","values":["Schmidt, Zachery"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2025-02-21T21:44:59Z","2020"]},{"key":"dc:publisher","label":"Institution","values":["State University of New York at Buffalo"]},{"key":"dc:relation","label":"Dc Relation","values":["Supplemental files: One PDF named Schmidt_supporting-figures-01-10.pdf that contains supporting figures 1 through 10."]},{"key":"dc:type","label":"Dc Type","values":["Text","Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["chemistry"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/10477/86778"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["M.S.","Semiconductor quantum dots (QDs) are interesting materials for the active layer in solar cells. Their high molar absorption coefficients, easily tunable band gaps, and the possibilities of multiple exciton generation and hot electron injection make them attractive candidates for solar cells. One type of quantum dot sensitized solar cell (QDSSC) uses bifunctional linkers to bind the QDs to the TiO2 surface. The most common bifunctional linker is 3-mercaptopropionic acid (MPA), which has a carboxylic acid anchoring group for attachment to TiO2. Many studies have shown this carboxylic acid anchoring group to be too labile, resulting in poor power conversion efficiencies of QDSSCs and the degradation of photoelectrochemical performance. Other types of solar cells such as dye-sensitized and porphyrin-derived cells have used phosphonic acid and hydroxamic acid anchoring groups with some success. This thesis focuses on synthesizing two alternatives to MPA: (i) a phosphonic acid-bearing bifunctional ligand 2-mercaptoethylphosphonic acid (MEPA) and (ii) a hydroxamic acid-bearing bifunctional ligand 3-mercaptopropylhydroxamic acid (MPHA). A careful evaluation of their persistence on the TiO2 surface and their excited-state electron transfer properties is provided. MEPA and MPHA had similar Kad values, and both persisted on the TiO2 surface longer than MPA. MEPA and MPHA were shown to be able to produce non-agglomerated QD films, and early electron-transfer studies are promising for MPHA.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Attaching CdSe Quantum Dots to TiO2 Using Ligands with Phosphonic and Hydroxamic Acid Anchoring Groups: A Study of Persistence and Electron Transfer"]}]}],"canonical_facts":{"dc:contributor":["Watson, David","Chemistry"],"dc:creator":["Schmidt, Zachery"],"dc:date":["2025-02-21T21:44:59Z","2020"],"dc:description":["M.S.","Semiconductor quantum dots (QDs) are interesting materials for the active layer in solar cells. Their high molar absorption coefficients, easily tunable band gaps, and the possibilities of multiple exciton generation and hot electron injection make them attractive candidates for solar cells. One type of quantum dot sensitized solar cell (QDSSC) uses bifunctional linkers to bind the QDs to the TiO2 surface. The most common bifunctional linker is 3-mercaptopropionic acid (MPA), which has a carboxylic acid anchoring group for attachment to TiO2. Many studies have shown this carboxylic acid anchoring group to be too labile, resulting in poor power conversion efficiencies of QDSSCs and the degradation of photoelectrochemical performance. Other types of solar cells such as dye-sensitized and porphyrin-derived cells have used phosphonic acid and hydroxamic acid anchoring groups with some success. This thesis focuses on synthesizing two alternatives to MPA: (i) a phosphonic acid-bearing bifunctional ligand 2-mercaptoethylphosphonic acid (MEPA) and (ii) a hydroxamic acid-bearing bifunctional ligand 3-mercaptopropylhydroxamic acid (MPHA). A careful evaluation of their persistence on the TiO2 surface and their excited-state electron transfer properties is provided. MEPA and MPHA had similar Kad values, and both persisted on the TiO2 surface longer than MPA. MEPA and MPHA were shown to be able to produce non-agglomerated QD films, and early electron-transfer studies are promising for MPHA.","**To request an accessible version of the file(s) associated with this item, contact library@buffalo.edu. Please include the item's persistent URL [http://hdl.handle.net/. . .] in your request.**"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/10477/86778"],"dc:language":["eng"],"dc:publisher":["State University of New York at Buffalo"],"dc:relation":["Supplemental files: One PDF named Schmidt_supporting-figures-01-10.pdf that contains supporting figures 1 through 10."],"dc:rights":["Users of works found in University at Buffalo Institutional Repository (UBIR) are responsible for identifying and contacting the copyright owner for permission to reuse. University at Buffalo Libraries do not manage rights for copyright-protected works and cannot assist with permissions.","Copyright retained by author."],"dc:subject":["chemistry"],"dc:title":["Attaching CdSe Quantum Dots to TiO2 Using Ligands with Phosphonic and Hydroxamic Acid Anchoring Groups: A Study of Persistence and Electron Transfer"],"dc:type":["Text","Thesis"]},"updated_at":"2026-07-27T19:05:37Z"}