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Pt TPE cages harvest light for cyclization
Self-assembled platinum–tetraphenylethene cages transfer energy to rhodamine B (up to 77% ΦET) and photocatalyze maleimide–aniline cyclization in water-rich solvent.
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How are the cages assembled?
Two-component coordination of tetratopic TPE-imidazole L with trans-Pt acceptors.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
Ligand L yield?
67% from tetrakis(bromomethyl)TPE plus imidazole.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
How is a single assembly shown by 31P NMR?
A sharp singlet with 195Pt satellites for each cage.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
AIE enhancement in 90% water/MeCN?
5-fold (1b), 25-fold (2b), 16-fold (3b) versus dilute solution.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
Aggregate quantum yield of 2b?
25.67% (versus 4.63% dilute).
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
FRET acceptor?
Rhodamine B, overlapping cage emission.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
ΦET at 5:1 donor/acceptor?
77% for 2b+RhB and 58% for 3b+RhB.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
Antenna effects?
21 (2b+RhB) and 16 (3b+RhB).
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
Photocatalytic test reaction?
Oxidative cyclization of N,N-dimethylaniline with N-alkyl/aryl maleimides.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
Yield of 6a with 2a+RhB?
97% after 12 h visible light in 90% water/MeCN.
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified
DFT TPE–TPE distances?
9.1 Å (cage 1), 20.4 Å (2), 17.8 Å (3).
Source: Self-assembled metallasupramolecular cages towards light harvesting systems for oxidative cyclization · DOI · quote verified