Cysteine Modification of Glutathione-Stabilized Au Nanoclusters to Red-Shift and Enhance the Electrochemiluminescence for Sensitive Bioanalysis

2022 ◽  
Author(s):  
Hongying Jia ◽  
Lei Yang ◽  
Xue Dong ◽  
Limin Zhou ◽  
Qin Wei ◽  
...  
Keyword(s):  
Red Shift ◽  
Cysteine Modification ◽  
Au Nanoclusters

scholarly journals Exciton Coupling and Conformational Changes Impacting the Excited State Properties of Metal Organic Frameworks

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4230
Author(s):  
Andreas Windischbacher ◽  
Luca Steiner ◽  
Ritesh Haldar ◽  
Christof Wöll ◽  
Egbert Zojer ◽  
...  
Keyword(s):  
Conformational Changes ◽  
Photophysical Properties ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Red Shift ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Exciton Coupling ◽  
Metal Organic ◽  
Crystalline Metal

In recent years, the photophysical properties of crystalline metal-organic frameworks (MOFs) have become increasingly relevant for their potential application in light-emitting devices, photovoltaics, nonlinear optics and sensing. The availability of high-quality experimental data for such systems makes them ideally suited for a validation of quantum mechanical simulations, aiming at an in-depth atomistic understanding of photophysical phenomena. Here we present a computational DFT study of the absorption and emission characteristics of a Zn-based surface-anchored metal-organic framework (Zn-SURMOF-2) containing anthracenedibenzoic acid (ADB) as linker. Combining band-structure and cluster-based simulations on ADB chromophores in various conformations and aggregation states, we are able to provide a detailed explanation of the experimentally observed photophysical properties of Zn-ADB SURMOF-2: The unexpected (weak) red-shift of the absorption maxima upon incorporating ADB chromophores into SURMOF-2 can be explained by a combination of excitonic coupling effects with conformational changes of the chromophores already in their ground state. As far as the unusually large red-shift of the emission of Zn-ADB SURMOF-2 is concerned, based on our simulations, we attribute it to a modification of the exciton coupling compared to conventional H-aggregates, which results from a relative slip of the centers of neighboring chromophores upon incorporation in Zn-ADB SURMOF-2.

scholarly journals DsbB elicits a red-shift of bound ubiquinone during the catalysis of DsbA oxidation. Vol. 279 (2004) 6761-6768

2004 ◽  
Vol 279 (23) ◽  
pp. 24906
Author(s):  
Kenji Inaba ◽  
Yoh-hei Takahashi ◽  
Nobutaka Fujieda ◽  
Kenji Kano ◽  
Hideto Miyoshi ◽  
...  
Keyword(s):  
Red Shift

scholarly journals Synthesis and Luminescence Properties of Two-Electron Bimetallic Cu–Ag and Cu–Au Nanoclusters via Copper Hydride Precursors

2021 ◽  
Author(s):  
Rhone P. Brocha Silalahi ◽  
Tzu-Hao Chiu ◽  
Jhen-Heng Kao ◽  
Chun-Yen Wu ◽  
Chi-Wei Yin ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Copper Hydride ◽  
Au Nanoclusters

scholarly journals Post-Synthesis Modification of Photoluminescent and Electrochemiluminescent Au Nanoclusters with Dopamine

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 46
Author(s):  
Jae Hyun Kim ◽  
Joohoon Kim
Keyword(s):  
Near Infrared ◽  
Au Nanoclusters ◽  
Metallic Core ◽  
Thiolate Ligand ◽  
Pl Intensity ◽  
Post Synthesis

Here, we report a post-synthesis functionalization of the shell of Au nanoclusters (NCs) synthesized using glutathione as a thiolate ligand. The as-synthesized Au NCs are subjected to the post-synthesis functionalization via amidic coupling of dopamine on the cluster shell to tailor photoluminescence (PL) and electrochemiluminescence (ECL) features of the Au NCs. Because the NCs’ PL at ca. 610 nm is primarily ascribed to the Au(I)-thiolate (SG) motifs on the cluster shell of the NCs, the post-synthesis functionalization of the cluster shell enhanced the PL intensity of the Au NCs via rigidification of the cluster shell. In contrast to the PL enhancement, the post-synthesis modification of the cluster shell does not enhance the near-infrared (NIR) ECL of the NCs because the NIR ECL at ca. 800 nm is ascribed to the Au(0)-SG motifs in the metallic core of the NCs.

Observation of an Unusually Large IR Red-Shift in an Unconventional S–H···S Hydrogen-Bond

2021 ◽  
Vol 12 (4) ◽  
pp. 1228-1235
Author(s):  
Kamal K. Mishra ◽  
Kshetrimayum Borish ◽  
Gulzar Singh ◽  
Prakash Panwaria ◽  
Surajit Metya ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Red Shift

Near-Infrared Electrochemiluminescence of Dual-Stabilizer-Capped Au Nanoclusters for Immunoassays

2021 ◽  
Author(s):  
Hongying Jia ◽  
Siqi Yu ◽  
Lei Yang ◽  
Qin Wei ◽  
Huangxian Ju
Keyword(s):  
Near Infrared ◽  
Au Nanoclusters

Mechanistic insights into the two-phase synthesis of heteroleptic Au nanoclusters

Nanoscale ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 3512-3518
Author(s):  
Xiangyu Wang ◽  
Shanshan Wang ◽  
Shuyu Qian ◽  
Naiwei Liu ◽  
Xinyue Dou ◽  
...  
Keyword(s):  
Mechanistic Study ◽  
Au Nanoclusters ◽  
Two Phase ◽  
Phase Synthesis

A mechanistic study on the two-phase synthesis of heteroleptic Au nanoclusters is reported here.

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