resumo
pi-Conjugated materials are highly attractive owing to their unique optical and electronic properties. Covalent organic frameworks (COFs) offer a great opportunity for precise arrangement of building units in a pi-conjugated crystalline matrix and tuning of the properties through choice of functionalities or post-synthetic modification. With this review, we aim at summarizing both the most representative as well as emerging strategies for the synthesis of pi-conjugated COFs. We give examples of direct synthesis using large, pi-extended building blocks. COFs featuring fully conjugated linkages such as vinylene, pyrazine, and azole are discussed. Then, post-synthetic modification methods that result in the extension of the COF pi-system are reviewed. Throughout, mechanistic insights are presented when available. In the context of their utilization as film devices, we conduct a concise survey of the prominent COF layer deposition techniques reported and their aptness for the deposition of fused aromatic systems. This review discusses the most representative as well as emerging strategies for the synthesis of pi-conjugated covalent organic frameworks (COFs), including incorporation of pi-extended building blocks, pi-conjugation through highly conjugated linkages, as well as post-synthetic modification (PSM) strategies. Various approaches of growing films of such structures are also presented. image
palavras-chave
ORIENTED THIN-FILMS; CRYSTALLINE; CONVERSION; COFS; KNOEVENAGEL; NITROGEN; PLATFORM; DESIGN
categoria
Chemistry
autores
Prieto, T; Ponte, C; Guntermann, R; Medina, DD; Salonen, LM
nossos autores
Clara Alves Ponte
Estudante de doutoramentoagradecimentos
This work received funding through the Spanish Ministry of Science and Innovation MCIN/AEI/FEDER (10.13039/501100011033) through the Syrocco project PID2022-137591NA-I00 via Proyectos de Generacion de Conocimiento 2022 and from the Deutsche Forschungsgemeinschaft (DFG) in the context of the National Research Network COORNETs (SPP 1928 ME 4515/1-2) and the Free State of Bavaria through the Research Network "Solar Technologies go Hybrid". CP acknowledges Fundacao para a Ciencia e Tecnologia (FCT) for the Ph.D. scholarship 2021.05983.BD. LMS acknowledges financial support from the Spanish Ministry of Science and Innovation MCIN/AEI/FEDER (10.13039/501100011033) through the Ramon y Cajal grant RYC2020-030414-I. Funding for open access charge: Universidade de Vigo/ CRUE-CISUG.