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Approaching the Integer-Charge Transfer Regime in Molecularly Doped Oligothiophenes by Efficient Decarboxylative Cross-Coupling

Author(s): Liu JT; Hase H; Taylor S; Salzmann I; Forgione P;

A library of symmetrical linear oligothiophene was prepared employing decarboxylative cross-coupling reaction as the key transformation. Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or add...

Article GUID: 31961982
In Vivo Solid-Phase Microextraction for Sampling of Oxylipins in Brain of Awake, Moving Rats

Author(s): Napylov A; Reyes-Garces N; Gomez-Rios G; Olkowicz M; Lendor S; Monnin C; Bojko B; Hamani C; Pawliszyn J; Vuckovic D;...

Oxylipins are key lipid mediators of important brain processes, including pain, sleep, oxidative stress, and inflammation. For the first time, an in-depth profile of up to 52 oxylipins can be obtai...

Article GUID: 31697450
Intrinsic Time-Tunable Emissions in Core-Shell Upconverting Nanoparticle Systems.

Author(s): Tessitore G, Maurizio SL, Sabri T, Capobianco JA

Angew Chem Int Ed Engl. 2019 Jun 04;: Authors: Tessitore G, Maurizio SL, Sabri T, Capobianco JA

Article GUID: 31161694
Title:Intrinsic Time-Tunable Emissions in Core-Shell Upconverting Nanoparticle Systems.
Authors:Tessitore G,  Maurizio SL,  Sabri T,  Capobianco JA
Link:https://www.ncbi.nlm.nih.gov/pubmed/31161694?dopt=Abstract
Category:Angew Chem Int Ed Engl
PMID:31161694
Dept Affiliation: CNSR
1 Department of Chemistry and Biochemistry and Centre for NanoScience Research, Concordia University, 7141 Sherbrooke St. W., Montreal, Quebec, H4B 1R6, Canada.

Description:

Intrinsic Time-Tunable Emissions in Core-Shell Upconverting Nanoparticle Systems.

Angew Chem Int Ed Engl. 2019 Jun 04;:

Authors: Tessitore G, Maurizio SL, Sabri T, Capobianco JA

Abstract

Color-tunable luminescence has been extensively investigated in upconverting nanoparticles for diverse applications, each exploiting emissions in different spectral regions. Manipulation of the emission wavelength is accomplished by varying the composition of the luminescent material or the characteristics of the excitation source. Here we propose core-shell ß-NaGdF4: Tm3+, Yb3+/ ß-NaGdF4: Tb3+ nanoparticles as intrinsic time-tunable luminescent materials. The time dependency of the emission wavelength only depends on the different decay time of the two emitters, without additional variation of the dopant concentration or pumping source. The time-tunable emission was recorded with a commercially available camera. The dynamics of the emissions is thoroughly investigated, and we established that the energy transfer from the 1D2 excited state of Tm3+ ions to the higher energy excited states of Tb3+ ions to be the principal mechanism to the population of the 5D4 level for the Tb3+ ions.

PMID: 31161694 [PubMed - as supplied by publisher]