Plasmon-enhanced light absorption at organic-coated interfaces: collectivity matters

Abstract

Intermolecular interactions in thin films of organic dyes control the enhancement of the optical absorption by collective plasmons of gold nanoparticles.

Structure/Property Control in Photocatalytic Organic Semiconductor Nanocrystals

“…Different from the previous strategies that adopted chemistry, size or shape control to modify the optical properties of plasmonic metals, here a real‐time control of the spatial arrangement and interaction between Au NPs and organic films during Au NP deposition ( Figure a–d) yielded a more than 500% enhancement of their absorption in a wide range of wavelengths (520–660 nm, Figure 18e–j). [ 113 ] Further examples were provided by core‐shell polymeric micelles containing AuNPs and metalloporphyrin in the core, as higher Au NPs concentration resulted in stronger absorption bands due to SPR enhanced absorption between Au NPs (absorption peack at ≈510 nm) and metalloporphyrin (Soret band at 421 nm, Q bands at 555 and 595 nm). In addition, FL quenching was observed in the complex, indicating electron transfer from porphyrin to Au NPs.…”

“…Reproduced with permission. [ 113 ] Copyright 2018, Royal Society of Chemistry. k) TEM image of the ternary g‐C 3 N 4 /Au/Pt composites.…”

Applications of Photoinduced Phenomena in Supramolecularly Arranged Phthalocyanine Derivatives: A Perspective

“…In the field of the photocatalysis, Pcs are often coupled with nanoparticles for several reasons: for example nanoparticles with magnetic features can be used to easily remove Pc catalyst [131], metallic plasmonic nanoparticles can work as plasmonic antennas to transfer energy on Pc catalyst [132] or phthalocyanines derivative can be used to shift the photocatalytic activity toward the visible range [133]. A ZnPc derivative functionalized with a carboxyl group and three 15-crown-5 ether substituents (Figure 24) was designed and used as a photosensitizer for a Pt-loaded graphitic carbon nitride for H 2 photoproduction with visible illumination [134].…”

Impact of photosensitizer orientation on the distance dependent photocatalytic activity in zinc phthalocyanine–nanoporous gold hybrid systems

“…The eld of hybrid materials consisting of a nanostructured metal and various organic or organometallic functionalities has recently gained growing attention due to their possible applications in different elds ranging from catalysis and sensor applications to new medical treatments. [1][2][3][4] Especially regarding their photophysical properties those hybrid systems are of emerging interest as many of the used nanostructured metal skeletons show special optical properties due to their surface plasmon resonance. [4][5][6] Therefore, several hybrid systems were designed and recently reported as alternatives for classical organometallic systems for example in photon upconverting systems or as completely new approaches like plasmonic sensing or medical applications like photodynamic cancer therapy (PDT).…”

“…[1][2][3][4] Especially regarding their photophysical properties those hybrid systems are of emerging interest as many of the used nanostructured metal skeletons show special optical properties due to their surface plasmon resonance. [4][5][6] Therefore, several hybrid systems were designed and recently reported as alternatives for classical organometallic systems for example in photon upconverting systems or as completely new approaches like plasmonic sensing or medical applications like photodynamic cancer therapy (PDT). [7][8][9][10][11][12] All of these processes are based on a photophysical interaction between the nanostructured metal support and the attached functionality, mostly in the form of energy transfer from the plasmon resonance to the excited state of the attached organic or organometallic moiety.…”