Organo-Modified Montmorillonite Enhanced Chemiluminescence via Inactivation of Halide Counterions in a Micellar Solution

Chen, Shuang; Zhou, Wenjuan; Cao, Yuqing; Xue, Congcong; Lu, Chao

doi:10.1021/jp411290z

Cited by 22 publications

(13 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The TPE-DTAB showed a positive ζ potential of 43.5 mV, whereas the Na + -MMT particles had the negatively charged surfaces with a negative ζ potential of −28.8 mV. For the TPE-DTAB-modified MMT, its ζ potential was changed to approximately zero, indicating that TPE-DTA + ions were adsorbed at the MMT surface via electrostatic attraction to expose their hydrophobic tails to the aqueous environment 55 . In addition, the Na + -MMT particles dispersed well in water; however, the TPE-DTAB-modified MMT particles seemed to be very swollen and hydrophobic.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, the inorganic cations at the external surfaces of MMT particles would be also replaced by TPE-DTA + ions as a result of the ion exchange reaction between TPE-DTAB and Na + -MMT. It is known that the adsorption of ionic surfactants at the particle surface usually has a great impact on the ζ potential of the particle 52 53 54 55 . Therefore, to clarify the configuration of TPE-DTAB at the MMT surfaces, we measured the ζ potential of the TPE-DTAB, Na + -MMT and TPE-DTAB-modified MMT, respectively ( Fig.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Fluorescence microscopy as an alternative to electron microscopy for microscale dispersion evaluation of organic–inorganic composites

et al. 2016

Self Cite

View full text Add to dashboard Cite

Inorganic dispersion is of great importance for actual implementation of advanced properties of organic–inorganic composites. Currently, electron microscopy is the most conventional approach for observing dispersion of inorganic fillers from ultrathin sections of organic–inorganic composites at the nanoscale by professional technicians. However, direct visualization of macrodispersion of inorganic fillers in organic–inorganic composites using high-contrast fluorescent imaging method is hampered. Here we design and synthesize a unique fluorescent surfactant, which combines the properties of the aggregation-induced emission (AIE) and amphiphilicity, to image macrodispersion of montmorillonite and layered double hydroxide fillers in polymer matrix. The proposed fluorescence imaging provides a number of important advantages over electron microscope imaging, and opens a new avenue in the development of direct three-dimensional observation of inorganic filler macrodispersion in organic–inorganic composites.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fluorescence microscopy as an alternative to electron microscopy for microscale dispersion evaluation of organic–inorganic composites

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…The relatively sharp band at ~3622 cm −1 is due to the stretching vibrations of OH groups bonded to octahedral Al 3+ cations, and the band at ~3421 cm −1 can be attributed to the stretching vibrations of physisorbed interlayer water. [ 52 ] The strong and broad band at ~1000–1100 cm −1 is due to the Si–O–Si stretching vibrations. The observed peaks at ~2853 and 2925 cm −1 in the FT‐IR spectra of CTA–MMT and (CTA) 3 PMo‐MMT can be attributed to the stretching vibrations of C–H groups and strongly confirm the existence of CTA + cations in the intercalated materials.…”

Section: Resultsmentioning

confidence: 99%

A new nanocomposite catalyst based on clay‐supported heteropolyacid for the green synthesis of 2,4,5‐trisubstituted imidazoles

Masteri‐Farahani

Ezabadi

Mazarei

et al. 2020

Applied Organom Chemis

View full text Add to dashboard Cite

Intercalation of cetyltrimethylammonium (CTA +) cations within the nanolayers of montmorillonite (MMT) clay followed by reaction with Keggin-type phosphomolybdic acid (PMo) resulted in the synthesis of (CTA) 3 PMo-MMT nanocomposite catalyst. The prepared nanocomposite catalyst was characterized using different physicochemical methods such as Fourier-transform infrared and inductively coupled plasma-optical emission spectroscopies, X-ray diffraction, and nitrogen adsorption-desorption (Brunauer-Emmett-Teller method) analyses. Characterization techniques demonstrated the intercalation of (CTA) 3 PMo species into the nanolayers of MMT. The resulting (CTA) 3 PMo-MMT nanocomposite catalyst efficiently catalyzed the synthesis of 2,4,5-trisubstituted imidazoles under solvent-free conditions. The efficiency is due to the fact that the presence of CTA + species makes the nanocomposite catalyst hydrophobic and facilitates the accessibility of hydrophobic reactants to active sites in the course of the reaction. High activity and selectivity were achieved in the presence of the prepared nanocomposite catalyst. The nanocomposite catalyst was readily isolated from the reaction mixture using simple filtration, washed with ethanol, and recycled five times without a major loss of activity.

show abstract

“…On the other hand, the DBS-LDH-Co (II) þH 2 O 2 þOH À system could lead to a greater decrease in the fluorescence intensity of uranine in comparison to the DBS-LDHCu(II) þH 2 O 2 þ OH À system (see inset b of Fig. 2), indicating the formation of the larger amount of hydroxyl radicals ( OH) in the presence of the DBS-LDH-Co(II) þH 2 O 2 þ OH À system [36].…”

Section: Selective Sensing Towards Co(ii) In Fenton-like-dbs-ldh CL Smentioning

confidence: 99%

Organo-modified layered double hydroxide-catalyzed Fenton-like ultra-weak chemiluminescence for specific sensing of vitamin B12 in egg yolks

Zhang

Rong

et al. 2014

Talanta

Self Cite

View full text Add to dashboard Cite

a b s t r a c tIn general, the chemiluminescence (CL) sensing of vitamin B 12 is achieved by determining Co(II) liberated from acidified vitamin B 12 by a luminol system. However, the luminol system for sensing vitamin B 12 has poor selectivity due to serious interference from other metal ions. In this study, as a novel CL amplifier of the Co(II) þ H 2 O 2 þOH À ultra-weak CL reaction (Fenton-like system), dodecylbenzene sulfonate (DBS)-layered double hydroxides (LDHs) have been applied to the specific determination of vitamin B 12 by liberating Co(II). The CL intensity increased with increasing the concentration of vitamin B 12 in a wide range from 1.0 ng mL À 1 to 5 μg mL À 1 with a detection limit of 0.57 ng mL À 1 (S/ N¼ 3). The proposed method has been successfully applied to determine vitamin B 12 in egg yolk with simple procedures, shorter time and higher selectivity. Recoveries from spiked real samples were 96-103%. The results of the proposed method for sensing vitamin B 12 in real samples were agreed with those obtained by the standard inductively coupled plasma mass spectrometry (ICP-MS) method. To the best of our knowledge, this is the first report on the CL sensing of vitamin B 12 with high selectivity in the absence of luminol.

show abstract

Organo-Modified Montmorillonite Enhanced Chemiluminescence via Inactivation of Halide Counterions in a Micellar Solution

Cited by 22 publications

References 45 publications

Fluorescence microscopy as an alternative to electron microscopy for microscale dispersion evaluation of organic–inorganic composites

Fluorescence microscopy as an alternative to electron microscopy for microscale dispersion evaluation of organic–inorganic composites

A new nanocomposite catalyst based on clay‐supported heteropolyacid for the green synthesis of 2,4,5‐trisubstituted imidazoles

Organo-modified layered double hydroxide-catalyzed Fenton-like ultra-weak chemiluminescence for specific sensing of vitamin B12 in egg yolks

Contact Info

Product

Resources

About