Cucurbit[7/8]uril assisted modulations in the photophysical properties of 4′,6-diamidino-2-phenylindole dye

Sayed, Mhejabeen; Maity, Dilip Kumar; Pal, Haridas

doi:10.1016/j.jphotochem.2023.115088

Cited by 1 publication

(2 citation statements)

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“…The original absorption peak of DPBT-BPy was localized at 384 nm, which shifted gradually toward longer wavelengths and the absorbance increased slightly with the addition of CB[8], implying the occurrence of complexation. Based on the absorption titration data, the binding constant between DPBT-BPy and CB[8] was calculated to be 2.263 × 10 4 M –1 (Figure S9) using the previously reported method . The increase in absorbance of guests might be attributed to the reduced aggregation of DPBT-BPy molecules in water by the encapsulation process.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the absorption titration data, the binding constant between DPBT-BPy and CB [8] was calculated to be 2.263 × 10 4 M −1 (Figure S9) using the previously reported method. 42 The increase in absorbance of guests might be attributed to the reduced aggregation of DPBT-BPy molecules in water by the encapsulation process. The absorption peak showed a maximum red-shift of 8 nm for DPBT-BPy/CB [8] 1:1 and almost kept the same position, further increasing the amount of CB [8].…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Tunable Fluorescence, Morphology, and Antibacterial Behaviors of Conjugated Oligomers via Host–Guest Supramolecular Self-Assembly

Zhang,

Li,

Kang

et al. 2024

ACS Appl. Bio Mater.

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Host−guest supramolecular self-assembly has become one facile but efficient way to regulate the optical properties of conjugated oligomers and construct promising photofunctional materials. Herein, we design two linear conjugated oligomers terminated with two or four pyridinium moieties, which show different 1:1 'head-to-tail' binding patterns with cucurbit[8]uril (CB[8]) to form host−guest supramolecules. After being encapsulated in the hydrophobic cavity of the CB[8] host, the fluorescence emission of the conjugated oligomers undergoes significant changes, resulting in tunable fluorescence color with enhanced quantum yields. Triggered by the aggregation of supramolecules, the regular or rigid binding modes lead to the formation of cuboids and spheroids in nanoscale, respectively. Due to the macrocyclicconfinement effect, the light-driven reactive oxygen species (ROS) production of the host−guest complex is increased significantly, thereby improving the photodynamic antibacterial performance toward Staphylococcus aureus (S. aureus).

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Section: Resultsmentioning

confidence: 99%