The author of 《Excimer Formation in Carboxylic Acid-Functionalized Perylene Diimides Attached to Silicon Dioxide Nanoparticles》 were Gorman, Jeffrey; Pandya, Raj; Allardice, Jesse R.; Price, Michael B.; Schmidt, Timothy W.; Friend, Richard H.; Rao, Akshay; Davis, Nathaniel J. L. K.. And the article was published in Journal of Physical Chemistry C in 2019. Electric Literature of C5H6O2 The author mentioned the following in the article:
The creation of artificial light-harvesting complexes involves the ordered arrangement of chromophores in space. To guarantee efficient energy-transfer processes, organic dyes must be brought into close proximity, often leading to aggregation and the formation of excimer states. In recent years, the attachment of ligand-based chromophores to nanoparticles has also generated interest in relation to improved solar harvesting and spin-dependent electronic interactions such as singlet fission and upconversion. We explore the covalent attachment of two novel perylene-diimide (PDI) carboxylic acid ligands to silicon dioxide nanoparticles. This allows us to study electronic interactions between the ligands when attached to nanoparticles because these cannot couple to the wide band gap silicon dioxide. One of the synthesized PDI ligands has sterically hindering phenols in the bay position and undergoes minimal optical changes upon attachment, but the other forms an excimer state with a red-shifted and long-lived florescence. As such, mol. structure changes offer a method to tune weak and strong interactions between ligand layers on nanocrystal surfaces. In the experiment, the researchers used Ethyl propiolate(cas: 623-47-2Electric Literature of C5H6O2)
Ethyl propiolate(cas: 623-47-2) is a clear colorless to pale yellow liquid that is soluble in ethanol, ether and chloroform. It an important organic chemical raw material and pharmaceutical intermediate. Ethyl propargylate is obtained by oxidation of propargyl alcohol to propargylic acid followed by esterification.Electric Literature of C5H6O2
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics