Light-driven self-assembly of spiropyran-functionalized covalent organic framework

Gobinda Das, Thirumurugan Prakasam, Nour Alkhatib, Rasha G. AbdulHalim, Falguni Chandra, Sudhir Kumar Sharma, Bikash Garai, Sabu Varghese, Matthew A. Addicoat, Florent Ravaux, Renu Pasricha, Ramesh Jagannathan, Na’il Saleh, Serdal Kirmizialtin, Mark A. Olson () and Ali Trabolsi ()
Additional contact information
Gobinda Das: New York University Abu Dhabi (NYUAD), Saadiyat Island
Thirumurugan Prakasam: New York University Abu Dhabi (NYUAD), Saadiyat Island
Nour Alkhatib: New York University Abu Dhabi (NYUAD), Saadiyat Island
Rasha G. AbdulHalim: New York University Abu Dhabi (NYUAD), Saadiyat Island
Falguni Chandra: United Arab Emirates University
Sudhir Kumar Sharma: New York University Abu Dhabi (NYUAD)
Bikash Garai: New York University Abu Dhabi (NYUAD), Saadiyat Island
Sabu Varghese: New York University Abu Dhabi
Matthew A. Addicoat: Nottingham Trent University
Florent Ravaux: Technology Innovation Institute
Renu Pasricha: New York University Abu Dhabi
Ramesh Jagannathan: New York University Abu Dhabi (NYUAD)
Na’il Saleh: United Arab Emirates University
Serdal Kirmizialtin: New York University Abu Dhabi (NYUAD), Saadiyat Island
Mark A. Olson: Texas A&M University Corpus Christi
Ali Trabolsi: New York University Abu Dhabi (NYUAD), Saadiyat Island

Nature Communications, 2023, vol. 14, issue 1, 1-16

Abstract: Abstract Controlling the number of molecular switches and their relative positioning within porous materials is critical to their functionality and properties. The proximity of many molecular switches to one another can hinder or completely suppress their response. Herein, a synthetic strategy involving mixed linkers is used to control the distribution of spiropyran-functionalized linkers in a covalent organic framework (COF). The COF contains a spiropyran in each pore which exhibits excellent reversible photoswitching behavior to its merocyanine form in the solid state in response to UV/Vis light. The spiro-COF possesses an urchin-shaped morphology and exhibits a morphological transition to 2D nanosheets and vesicles in solution upon UV light irradiation. The merocyanine-equipped COFs are extremely stable and possess a more ordered structure with enhanced photoluminescence. This approach to modulating structural isomerization in the solid state is used to develop inkless printing media, while the photomediated polarity change is used for water harvesting applications.

Date: 2023
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DOI: 10.1038/s41467-023-39402-8

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