Ligand shell size effects on one- and two-photon excitation fluorescence of zwitterion functionalized gold nanoclusters

Perić, Martina; Maršić, Željka Sanader; Russier‐Antoine, Isabelle; Fakhouri, Hussein; Bertorelle, Franck; Brevet, Pierre‐François; Guével, Xavier Le; Antoine, Rodolphe; Bonačić‐Koutecký, Vlasta

doi:10.1039/c9cp05262c

Cited by 28 publications

(27 citation statements)

References 53 publications

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“… 20 Additionally, the vibration and rotation of molecular chains in organic ligands cause energy loss through nonradiative transition. 21 Surface rigidification of AuNCs by introducing counterions, modifying bulky molecules or capping zwitterionic ligands has been demonstrated to significantly enhance the luminescence intensity. 5 Similar to the aggregation induced emission of organic molecules, restricting movement of the organic ligands can also explain the enhanced fluorescence of AuNCs.…”

Section: Regulating the Optical Properties Of A Gold Nanoclustermentioning

confidence: 99%

Regulating the Optical Properties of Gold Nanoclusters for Biological Applications

et al. 2020

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Gold nanoclusters are promising optically functional materials because of their attractive optical properties, such as luminescence, two-photon absorption, photothermal conversion, and photodynamics. Regulating the optical functions of gold nanoclusters and improving their performance have attracted wide interest in biological applications. In this Review, we introduce the principles to manipulate both the intrinsic optical properties and the apparent optical performance of gold nanoclusters. Manipulating the surface ligands and compounding with other nanomaterials are facile and efficient strategies. Based on the regulated optical properties, the gold nanoclusters can be well applied in various biomedical applications from multimodal bioimaging toward theranostics. By correlating structures and optical properties, we expect a better utilization of the optical gold nanoclusters in the biological field.

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Section: Regulating the Optical Properties Of A Gold Nanoclustermentioning

confidence: 99%

Regulating the Optical Properties of Gold Nanoclusters for Biological Applications

et al. 2020

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“…Thus, the emergence of generalized principles governing the properties of clusters is deemed essential. Clearly, quantum chemistry methods elucidating the geometry of the clusters and configuring their optical properties in terms of molecular transitions should be conducted in further depth for the assembly of clusters, and innovative approaches such as the hybrid QM/MM (quantum mechanics/molecular mechanics) approach might address their structure–properties relationships [ 117 , 118 , 119 , 120 , 121 ].…”

Section: Discussionmentioning

confidence: 99%

Controlling the Chemistry of Nanoclusters: From Atomic Precision to Controlled Assembly

Basu

Antoine

2021

Nanomaterials

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Metal nanoclusters have gained prominence in nanomaterials sciences, owing to their atomic precision, structural regularity, and unique chemical composition. Additionally, the ligands stabilizing the clusters provide great opportunities for linking the clusters in higher order dimensions, eventually leading to the formation of a repertoire of nanoarchitectures. This makes the chemistry of atomic clusters worth exploring. In this mini review, we aim to focus on the chemistry of nanoclusters. Firstly, we summarize the important strategies developed so far for the synthesis of atomic clusters. For each synthetic strategy, we highlight the chemistry governing the formation of nanoclusters. Next, we discuss the key techniques in the purification and separation of nanoclusters, as the chemical purity of clusters is deemed important for their further chemical processing. Thereafter which we provide an account of the chemical reactions of nanoclusters. Then, we summarize the chemical routes to the spatial organization of atomic clusters, highlighting the importance of assembly formation from an application point of view. Finally, we raise some fundamentally important questions with regard to the chemistry of atomic clusters, which, if addressed, may broaden the scope of research pertaining to atomic clusters.

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“…These clusters are composed of a few to hundreds of atoms with a size approaching the Fermi wavelength of an electron (~0.5 nm for Au and Ag), and they possess discrete molecular-like electronic energy band structures, resulting in intense light absorption and emission. Luminescent MNCs exhibit outstanding optical properties including a large Stokes shift (generally large than 100 nm), large two-photon absorption cross-section, good photostability, good biocompatibility, and the emission wavelength could be easily adjusted by controlling their size and surface ligands, which are not present in conventional organic dyes [1,9,11,21]. Their excellent luminous performance is attractive for the applications in biomedicine, since it provides avenues for designing optical sensors, biolabeling, bioimaging, photosensitizers, and light-emitting devices.…”

Section: Introductionmentioning

confidence: 99%

Origin of the Photoluminescence of Metal Nanoclusters: From Metal-Centered Emission to Ligand-Centered Emission

et al. 2020

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Recently, metal nanoclusters (MNCs) emerged as a new class of luminescent materials and have attracted tremendous interest in the area of luminescence-related applications due to their excellent luminous properties (good photostability, large Stokes shift) and inherent good biocompatibility. However, the origin of photoluminescence (PL) of MNCs is still not fully understood, which has limited their practical application. In this mini-review, focusing on the origin of the photoemission emission of MNCs, we simply review the evolution of luminescent mechanism models of MNCs, from the pure metal-centered quantum confinement mechanics to ligand-centered p band intermediate state (PBIS) model via a transitional ligand-to-metal charge transfer (LMCT or LMMCT) mechanism as a compromise model.

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Ligand shell size effects on one- and two-photon excitation fluorescence of zwitterion functionalized gold nanoclusters

Abstract: The effects of explicit ligands and of aqueous solvent on optical properties and in particular on the one- and two-photon excitation fluorescence of zwitterion functionalized gold nanoclusters have been studied.

Cited by 28 publications

References 53 publications

Regulating the Optical Properties of Gold Nanoclusters for Biological Applications

Regulating the Optical Properties of Gold Nanoclusters for Biological Applications

Controlling the Chemistry of Nanoclusters: From Atomic Precision to Controlled Assembly

Origin of the Photoluminescence of Metal Nanoclusters: From Metal-Centered Emission to Ligand-Centered Emission

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