An unusual emissive and colorimetric copper (II) detection by a selective probe based on a pseudo-crown cysteine dye: Solution and gas phase studies

Morais, Nuno; Fernandes, Luz; Ariana-Machado, Jessica; Capelo, José Luís; Lodeiro, Carlos; Oliveira, Elisabete

doi:10.1016/j.inoche.2017.11.001

Cited by 8 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, colourimetric changes from pale green to blue and consequently to colourless were visualized. Furthermore, quenching on the emission intensity at 785 nm is also verified with Cu 2+ , due to its paramagnetic nature leading to non-radiative deactivation processes [39,40].…”

Section: Sensorial Ability Towards Metal Ionsmentioning

confidence: 80%

Development of Cyanine 813@Imidazole-Based Doped Supported Devices for Divalent Metal Ions Detection

et al. 2022

Self Cite

View full text Add to dashboard Cite

A NIR cyanine@imidazole derivative Cy1 was synthesized and evaluated as a metal ion sensor in solution. Cy1 was shown to be very sensitive to all metal ions tested, presenting a blue shift in the absorption from 668 nm to 633 nm, followed by a change in colour from pale green to blue with Zn2+, Cd2+, Co2+, Ni2+ and Hg2+ ions. Despite the blue shift in the absorption, a decrease at 633 nm (with a colour change from pale green to colourless), as well as a quenching in the emission intensity at 785 nm were observed for Cu2+ ions. The results show the formation of sandwich complexes of two ligands per metal ion with the highest association constant observed for Cu2+ (Log Kass.abs = 14.76 ± 0.09; Log Kass.emis. = 14.79 ± 0.06). The minimal detectable amounts were found to be 31 nM and 37 nM, with a naked eye detection of 2.9 ppm and 2.1 ppm for Hg2+ and Cu2+ ions, respectively. These results prompted us to explore the applicability of Cy1 by its combination with nanomaterials. Thus, Cy1@ doped MNs and Cy1@ doped PMMA nanoparticles were synthesized. Both nanosystems were shown to be very sensitive to Cu2+ ions in water, allowing a naked-eye detection of at least 1 ppm for Cy1@ doped MNs and 7 ppm for Cy1@ doped PMMA. This colourimetric response is an easy and inexpensive way to assess the presence of metals in aqueous media with no need for further instrumentation.

show abstract

Section: Sensorial Ability Towards Metal Ionsmentioning

confidence: 80%

Development of Cyanine 813@Imidazole-Based Doped Supported Devices for Divalent Metal Ions Detection

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“… Carbazol-based DMF-buffer (1:1) 2.9 × 10 −6 EDTA – [ 42 ] 3. Pseudo-crown cysteine based MeCN 6.6 × 10 −6 – – [ 43 ] 4. Azo-phenol based EtOH:H 2 O (1:10) 7.2 × 10 −7 – HeLa cells bioimaging [ 44 ] 5.…”

Section: Resultsmentioning

confidence: 99%

A chromogenic diarylethene-based probe for the detection of Cu2+ in aqueous medium in Drosophila for early diagnosis of Alzheimer

Kumar,

Srivastava,

Kumar

et al. 2024

Heliyon

View full text Add to dashboard Cite

Functional Cyanine‐Based PVA:PVP Polymers as Antimicrobial Tools toward Food and Health‐Care Bacterial Infections

Marcelo

Galhano

Duarte

et al. 2022

Macromolecular Bioscience

Self Cite

View full text Add to dashboard Cite

The rising of multidrug-resistant bacteria and their associated proliferation as harmful microorganisms boosts the creation of new antibacterial surfaces and biomaterials with applications ranging from health to food packing. Herein, low-cost antibacterial PVA:PVP copolymers containing cyanine derivatives (1, 2, and 3) and their respective Cu 2+ complexes are successfully obtained and tested against Gram-negative and Gram-positive bacteria. The possible application in food packing is addressed by covering the surface of typical paper mockups with the doped polymers. All dye-doped polymers present a broad-spectrum antibacterial effect against Gram-positive bacteria, especially for Bacillus cereus (B. cereus), Staphylococcus aureus (S. aureus), and methicillin-resistant S. aureus (MRSA) strains, with PVA:PVP@3 and PVA:PVP@3-Cu being the most effective. Moreover, polymers containing cyanine derivatives present interesting inhibition effects against Pseudomonas aeruginosa (P. aeruginosa), where the production of its characteristic blue/green virulent pigment is not observed.

show abstract

An unusual emissive and colorimetric copper (II) detection by a selective probe based on a pseudo-crown cysteine dye: Solution and gas phase studies

Cited by 8 publications

References 29 publications

Development of Cyanine 813@Imidazole-Based Doped Supported Devices for Divalent Metal Ions Detection

Development of Cyanine 813@Imidazole-Based Doped Supported Devices for Divalent Metal Ions Detection

A chromogenic diarylethene-based probe for the detection of Cu2+ in aqueous medium in Drosophila for early diagnosis of Alzheimer

Functional Cyanine‐Based PVA:PVP Polymers as Antimicrobial Tools toward Food and Health‐Care Bacterial Infections

Contact Info

Product

Resources

About