Luminescence tuning and exciton dynamics of Mn-doped CsPbCl3 nanocrystals

Nanoscale ◽  
2017 ◽  
Vol 9 (43) ◽  
pp. 16722-16727 ◽  
Author(s):  
Apurba De ◽  
Navendu Mondal ◽  
Anunay Samanta
Keyword(s):  
Energy Transfer ◽  
Transient Absorption ◽  
Absorption Measurement ◽  
Exciton Dynamics ◽  
Ultrafast Transient Absorption ◽  
Mn Doped

In Mn-doped CsPbCl3 nanocrystals, Mn photoluminescence is widely tuned from yellow to red and exciton–dopant energy transfer timescales have been estimated through ultrafast transient absorption measurement.

Ultrafast Anisotropic Exciton Dynamics in a Water-Soluble Ionic Carbon Nitride Photocatalyst

2021 ◽  
Author(s):  
Chunyu Li ◽  
Christiane Adler ◽  
Igor Krivtsov ◽  
Dariusz Mitoraj ◽  
Robert Leiter ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Carbon Nitride ◽  
Transient Absorption ◽  
Water Soluble ◽  
Exciton Dynamics ◽  
Fast Charge ◽  
Transfer Processes ◽  
Ultrafast Transient Absorption ◽  
Orientational Dynamics ◽  
Soluble Poly

Ultrafast transient absorption anisotropy spectroscopy (TAA) reveals the orientational dynamics of light-induced excitations in a water soluble poly(heptazine imide). The results provide insights into the fast charge transfer processes in...

Unveiling the dimension-dependence of femtosecond nonlinear optical properties of tellurium nanostructures

2021 ◽  
Author(s):  
Qi Xiao ◽  
Bo Ma ◽  
Xian Fei ◽  
Duan-Wu Liu ◽  
Xin-Ping Zhai ◽  
...  
Keyword(s):  
Optical Properties ◽  
Absorption Spectroscopy ◽  
Nonlinear Optical ◽  
Transient Absorption ◽  
Nonlinear Optical Properties ◽  
Transient Absorption Spectroscopy ◽  
Exciton Dynamics ◽  
Ultrafast Transient Absorption ◽  
First Time ◽  
Ultrafast Transient Absorption Spectroscopy

For the first time, strong dimension-dependent femtosecond nonlinear optical properties were demonstrated in a variety of Te nanostructures. Ultrafast transient absorption spectroscopy revealed the dimension-dependent exciton dynamics.

Ultrafast Transient Absorption Studies of Hematite Nanoparticles: The Effect of Particle Shape on Exciton Dynamics

ChemSusChem ◽  
2013 ◽  
Vol 6 (10) ◽  
pp. 1907-1914 ◽  
Author(s):  
Bob C. Fitzmorris ◽  
Jonathan M. Patete ◽  
Jacqueline Smith ◽  
Xiomara Mascorro ◽  
Staci Adams ◽  
...  
Keyword(s):  
Particle Shape ◽  
Transient Absorption ◽  
Hematite Nanoparticles ◽  
Exciton Dynamics ◽  
Ultrafast Transient Absorption ◽  
Absorption Studies

Thymine Dimerization Induced by Oxidative DNA Lesions and Epigenetic Intermediates via Triplet-Triplet Energy Transfer

2020 ◽  
Author(s):  
Mauricio Lineros-Rosa ◽  
Antonio Francés-Monerris ◽  
Antonio Monari ◽  
Miguel Angél Miranda ◽  
Virginie Lhiaubet-Vallet
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Transient Absorption ◽  
Theoretical Calculations ◽  
Dna Lesions ◽  
Transient Absorption Spectroscopy ◽  
Triplet Energy ◽  
Pyrimidine Dimers ◽  
Triplet Energy Transfer ◽  
Dna Nucleobases

Interaction of nucleic acids with light is a scientific question of paramount relevance not only in the understanding of life functioning and evolution, but also in the insurgence of diseases such as malignant skin cancer and in the development of biomarkers and novel light-assisted therapeutic tools. This work shows that the UVA portion of sunlight, not absorbed by canonical DNA nucleobases, can be absorbed by 5-formyluracil (ForU) and 5-formylcytosine (ForC), two ubiquitous oxidative lesions and epigenetic intermediates present in living beings in natural conditions. We measure the strong propensity of these molecules to populate triplet excited states able to transfer the excitation energy to thymine-thymine dyads, inducing the formation of the highly toxic and mutagenic cyclobutane pyrimidine dimers (CPDs). By using steady-state and transient absorption spectroscopy, NMR, HPLC, and theoretical calculations, we quantify the differences in the triplet-triplet energy transfer mediated by ForU and ForC, revealing that the former is much more efficient in delivering the excitation energy and producing the CPD photoproduct. Although significantly slower than ForU, ForC is also able to harm DNA nucleobases and therefore this process has to be taken into account as a viable photosensitization mechanism. The present findings evidence a rich photochemistry crucial to understand DNA photodamage and of potential use in the development of biomarkers and non-conventional photodynamic therapy agents.

Charge-Transfer Dynamics at Ag/Ni-MOF/Cu2O heterostructure in Photoelectrochemical NH3 production

2021 ◽  
Author(s):  
Ying Liu ◽  
Jianmin Lu ◽  
Qianxiao Zhang ◽  
Yajie Bai ◽  
Xuliang Pang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Absorption Spectroscopy ◽  
Transient Absorption ◽  
Transient Absorption Spectroscopy ◽  
Yield Rate ◽  
Ultrafast Transient Absorption ◽  
Charge Transfer Dynamics ◽  
Ultrafast Transient Absorption Spectroscopy

Decoration of Ag-ultrathin Ni-MOF onside Cu2O was firstly fabricated. The charge-transfer dynamics at heterostructure was in-depth revealed by ultrafast transient absorption spectroscopy. NH3 yield rate (4.63 μg h-1 cm-2) with...

scholarly journals Effects of pH on the ultrafast transient absorption of iron (III) meso-tetrakis(4-N-methyl-pyridiniumyl) porphyrin (Fe3+TMPyP) molecular complexes

2021 ◽  
Vol 408 ◽  
pp. 113082
Author(s):  
Pablo J. Gonçalves ◽  
Lucas F. Sciuti ◽  
Newton M. Barbosa Neto ◽  
Rodrigo Costa e Silva ◽  
Eli Silveira-Alves ◽  
...  
Keyword(s):  
Transient Absorption ◽  
Molecular Complexes ◽  
Ultrafast Transient Absorption ◽  
Effects Of Ph
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