Synthesis, Characterization, and Metal Ion Coordination of a Multichromophoric Highly Luminescent Polysulfurated Pyrene

Abstract

We have designed a new multichromophoric system based on a tetra(phenylthio)pyrene core appended with four terpyridine units. The system behaves as a molecular antenna that collects light with the peripheral units and funnels the energy to the very highly luminescent core. The addition of metals ions to the investigated system can not only switch the direction of the intramolecular energy transfer, but also control the formation of three-dimensional nanoscopic objects in a dual function.

Fluorescent Cross‐Linked Supramolecular Polymer Constructed by Orthogonal Self‐Assembly of Metal–Ligand Coordination and Host–Guest Interaction

“…After Zn 2+ was added, the emission intensity of the monomer gradually quenched and a much broader weak band finally appeared at 458 nm after 2 equivalents of Zn 2+ (Figure b), suggesting the formation of aggregates. The fact that no TPY emission had been detected after fully coordinated with Zn 2+ indicates that the lowest excited state of TPY units is completely quenched by coordinating with Zn 2+ , which is in agreement with the result reported previously . This new weak band can be attributed to an excited state of Zn 2+ ‐TPY complex.…”

“…The fact that no TPY emission had been detected after fully coordinated with Zn 2 + indicates that the lowest excited state of TPY units is completely quenched by coordinating with Zn 2 + , which is in agreement with the result reported previously. [22] This new weak band can be attributed to an excited state of Zn 2 + -TPY complex.A saconsequence, from av isual observation, the fluorescence color of the solution altered from violet to cyan (Figure 1b,i nset). Attempts to characterize the in situ generated host·Zn 2 + + complex by 1 HNMR spectroscopyh ave failed due to the poor solubility of the complex in any solvents we tried.…”

Tetrachromophoric Systems Based On Rigid Tetraphenylmethane (TPM) and Tetraphenylethylene (TPE) Scaffolds

“…Polypyridyl units have found several applications in supramolecular chemistry as powerful and versatile ligands [30–33] . The tetrahedral structure of TPM has an ideal geometry to create 3D structures by coordination of terpyridine units with metal ions.…”

Pyrene Derivative Emitting Red or near-Infrared Light with Monomer/Excimer Conversion and Its Application to Ratiometric Detection of Hypochlorite

“…Thanks to the predictability of the two luminescence signals, pyrene moieties have been introduced in the design of numerous ratiometric sensors as reporters and other functional 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 3 materials [17][18][19][20][21][22][23][24][25][26][27][28] . The ratiometric mode of pyrene-involved sensing, which involves the synchronous measurement of two fluorescence signals at different wavelengths followed by calculation of their intensity ratio, is an elegant approach for achieving ratiometric sensing by simply using a single fluorophore molecule and is aimed to overcome unfavorable effects of the turn-on mode sensing.…”