Microwave assisted synthesis of boron and nitrogen rich graphitic quantum dots to enhance fluorescence of photosynthetic pigments

Budak, Esranur; Aykut, Sümeyye; Paşaoğlu, Mehmet Emin; Ünlü, Caner

doi:10.1016/j.mtcomm.2020.100975

Cited by 19 publications

(22 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon allows to increase the spectrum Please do not adjust margins Please do not adjust margins range in which the photosynthetic pigment can absorb lights, enhancing their photocatalytic activity. 191 Very recently, Prato and co-workers prepared and characterized a redox library of amino doped CDs with tunable oxidation/reduction properties starting from commercially available quinones, arginine and ethylene diamine highlighting their potential applicability as photocatalysts. 192 These CDs were prepared by microwave irradiation (240 °C, 26 bar and 200 W for 180 seconds) of an aqueous solution of the precursors, followed by dialysis.…”

Section: Microwave Methodsmentioning

confidence: 99%

Carbon dots for cancer nanomedicine: a bright future

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Microwave Methodsmentioning

confidence: 99%

Carbon dots for cancer nanomedicine: a bright future

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Carbon and heteroatom (N and BN)‐doped carbon QDs were synthesized using a modified microwave‐based bottom‐up synthesis method. [ 30,33 ] For the carbon QDs (C‐QD) the following procedure was performed: 100 mg citric acid was dissolved in 5 ml ultrapure water and put into a 50‐ml flat‐bottomed reaction flask. Then, the reaction flask was placed in a microwave oven (Arçelik MD554), heated for 5 min at 750 MW and a brownish solid final product was obtained.…”

Section: Methodsmentioning

confidence: 99%

“…[ 20–24 ] There have been numerous studies conducted on energy transfer between carbon or graphitic QDs and chlorophyll. [ 25–30 ] The common outcomes of these studies are: (1) carbon (or graphene) QDs serve as a useful energy donor for chlorophyll molecules, [ 27–29 ] or (2) addition of heteroatoms to the QD structure disrupts the energy flow from QDs to chlorophyll molecules. [ 27 ] Even though energy transfer between QDs and chlorophyll molecules has been widely studied for carbon QDs and heteroatom‐doped carbon QDs, no studies have been undertaken on obtaining carbon/graphene QDs doped with boron and nitrogen atoms and phthalocyanine conjugates, to examine their photophysical properties and the energy transfer between these two systems.…”

Section: Introductionmentioning

confidence: 99%

Effect of heteroatom‐doped carbon quantum dots on the red emission of metal‐conjugated phthalocyanines through hybridization

et al. 2021

Self Cite

View full text Add to dashboard Cite

Quantum dots (QDs) are significant fluorescent materials for energy transfer studies with phthalocyanines (Pcs) and phthalocyanine (Pc)‐like biomolecules (such as chlorophylls). Carbon‐based QDs, especially, have been used in numerous studies concerning energy transfer with chlorophylls, but the numbers of studies concerning energy transfer between phthalocyanines and carbon‐based QDs are limited. In this study, peripherally, hydroxythioethyl terminal group substituted metal‐free phthalocyanine (H2Pc) and zinc phthalocyanine (ZnPc) were noncovalently (electrostatic and/or π–π interaction) attached to carbon QDs containing boron and nitrogen to form QD‐Pc nanoconjugates. The QD‐Pc conjugates were characterized using different spectroscopic techniques (Fourier transform infrared spectroscopy and transmission electron microscopy). The absorption and fluorescence properties of QD‐Pc structures in solution were studied. It was found that the quantum yields of the QDs slightly decreased from 30% to 25% upon doping the QDs with heteroatoms B and N. Förster resonance energy transfer efficiency was calculated as 33% for BCN‐QD/ZnPc. For the other conjugates, almost no energy transfer from QDs to Pc cores was observed. It was shown that the energy transfer between QDs to Pc cores was completely different from the energy transfer between QDs and photosynthetic pigments, and therefore we concluded that heteroatom doping in the QD structure and the existence of zinc metal in the phthalocyanine structure is obligatory for an efficient energy transfer.

show abstract

“…N,B-doped GQDs were produced using a domestic microwave oven, where an aqueous solution of CA, U, and boric acid was heated at 750 W for 5 min under ambient conditions [ 86 ]. Produced dots had 12–22 at.% for B-atoms, N in the range of 16–24 at.%, and O 35–45 at.%.…”

Section: Graphene Quantum Dots Synthetic Strategiesmentioning

confidence: 99%

Shedding Light on Graphene Quantum Dots: Key Synthetic Strategies, Characterization Tools, and Cutting-Edge Applications

2021

View full text Add to dashboard Cite

During the last 20 years, the scientific community has shown growing interest towards carbonaceous nanomaterials due to their appealing mechanical, thermal, and optical features, depending on the specific nanoforms. Among these, graphene quantum dots (GQDs) recently emerged as one of the most promising nanomaterials due to their outstanding electrical properties, chemical stability, and intense and tunable photoluminescence, as it is witnessed by a booming number of reported applications, ranging from the biological field to the photovoltaic market. To date, a plethora of synthetic protocols have been investigated to modulate the portfolio of features that GQDs possess and to facilitate the use of these materials for target applications. Considering the number of publications and the rapid evolution of this flourishing field of research, this review aims at providing a broad overview of the most widely established synthetic protocols and offering a detailed review of some specific applications that are attracting researchers’ interest.

show abstract

Microwave assisted synthesis of boron and nitrogen rich graphitic quantum dots to enhance fluorescence of photosynthetic pigments

Cited by 19 publications

References 80 publications

Carbon dots for cancer nanomedicine: a bright future

Carbon dots for cancer nanomedicine: a bright future

Effect of heteroatom‐doped carbon quantum dots on the red emission of metal‐conjugated phthalocyanines through hybridization

Shedding Light on Graphene Quantum Dots: Key Synthetic Strategies, Characterization Tools, and Cutting-Edge Applications

Contact Info

Product

Resources

About