Naphthalene-based periodic nanoporous organosilicas: I. Synthesis and structural characterization

Dimos, Konstantinos; Antoniou, Myrsini K.; Meichanetzoglou, Aimilia; Lymperopoulou, Smaragda; Ouzouni, Maria‐Dimitra; Koutselas, Ioannis; Fokas, Demosthenes; Karakassides, Michael A.; Agostino, R. G.; Gournis, Dimitrios

doi:10.1016/j.micromeso.2012.03.037

Cited by 7 publications

(5 citation statements)

References 59 publications

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“…The sample with higher NI load, however, apparently has the pore walls fully lined with naphthalene rings from the NI molecules, rendering the surface hydrophobic, with low affinity toward the poly(alkylene oxide) surfactant (Figure B). Literature reports of PMO with the pore walls consisting of naphthalene groups were also shown to have hydrophobic pore surface. , …”

Section: Results and Discussionmentioning

confidence: 99%

“…Literature reports of PMO with the pore walls consisting of naphthalene groups were also shown to have hydrophobic pore surface. 20,21 Thermogravimetric Analysis. Figure S1 shows TGA and the corresponding differential thermogravimetric curves (DTG) of the SBANI samples after extraction with ethanol.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…15−19 Most reported systems for FRET have employed PMO, where the donor dye is integral part of the pore wall. PMO containing biphenyl, 4,5,9 naphthalene, 20,21 or anthracene 7,9 as donors have been reported. However, when bulky organic chromophores, such as tetraphenylpyrene 2 or perylenediimides, 22 were incorporated into PMO, disruption of the mesoporous order was observed at relatively low dye doping level.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Several methods are known for the synthesis of dye-functionalized mesoporous organosilicas, − including postsynthesis functionalization (grafting), co-condensation of an inorganic silica source (usually tetraethyl orthosilicate (TEOS) = Si(OEt) 4 ) together with an organic trialkoxysilane (R–Si(OR′) 3 ), and periodic mesoporous organosilicas (PMO), where the synthesis is made using up to 100% of a bridged organosilane of the type (R′O) 3 Si–R–Si(OR′) 3 . − Most reported systems for FRET have employed PMO, where the donor dye is integral part of the pore wall. PMO containing biphenyl, ,, naphthalene, , or anthracene , as donors have been reported. However, when bulky organic chromophores, such as tetraphenylpyrene or perylenediimides, were incorporated into PMO, disruption of the mesoporous order was observed at relatively low dye doping level.…”

Section: Introductionmentioning

confidence: 99%

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Color-Tunable Fluorescence and White Light Emission from Mesoporous Organosilicas Based on Energy Transfer from 1,8-Naphthalimide Hosts to Perylenediimide Guests

Trindade

Triboni²,

Castanheira

et al. 2015

J. Phys. Chem. C

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The present work reports Förster resonance energy transfer (FRET) from 1,8-naphthalimide (NI) donors bound to the pore walls of mesoporous silicas to perylenediimide (PDI) acceptors doped into the mesochannels. Mesoporous organosilicas containing covalently bound NI were synthesized by co-condensation of tetraethylorthosilicate (TEOS) with N-(3-(triethoxysilyl)propyl)-1,8-naphthalimide (TEPNI) in the presence of a block copolymer surfactant as a template. The resulting materials were highly ordered, presenting a 2D hexagonal structure, and displayed easily tunable optical properties, which could be controlled by the amount of NI in the sample. A sample prepared from a diluted TEPNI solution (SBANId) presented a blue, monomerlike emission. In contrast, when a concentrated TEPNI solution was used, the resulting material (SBANIc) displayed a green, excimerlike emission. For the FRET studies, N,N′-bis(2,6-dimethylphenyl)-3,4,9,10-perylenediimide was doped into the pores of the SBANI samples from chloroform solutions. When excited at the NI absorption maximum (350 nm), PDI-doped SBANIc showed intense quenching of the NI emission band, even at very low PDI doping, with quenching efficiencies reaching nearly 80% with only 0.6 mol % PDI (PDI/NI ≈ 1:170). The emission of PDI was observed at higher doping ratios, even though the PDI hardly absorbs at 350 nm, thus evidencing FRET from the host NI to the guest PDI. SBANI materials with a suitable amount of the PDI dopant displayed a white emission, spanning the whole visible spectrum.

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Section: Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Color-Tunable Fluorescence and White Light Emission from Mesoporous Organosilicas Based on Energy Transfer from 1,8-Naphthalimide Hosts to Perylenediimide Guests

Trindade

Triboni²,

Castanheira

et al. 2015

J. Phys. Chem. C

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“…Initial and final concentrations of MB in solution were determined by usinga Genesys 10S UV-Vis spectrophotometer based on the absorbance at λmax of 663 nm. Adsorption capacity (qe) of the adsorbent was calculated by following Equation (2) [21]. achieved when the MB concentration in aqueous solution is remained constant.…”

Section: Adsorption Studiesmentioning

confidence: 99%

Kinetic and Thermodynamics of Methylene Blue Adsorption onto Zero Valent Iron Supported on Mesoporous Silica

Hameed

Dewayanto

et al. 2016

Bull. Chem. React. Eng. Catal.

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Zero valent iron supported on mesoporous silicanano particles (NZVI/MSNs) was prepared by the aqueous phase borohydride reduction methods. Prior to the reduction, mesoporous silica nanoparticles (MSNs) were prepared through the activation of fumed silica with concentrated HCl by refluxing at 90 °C. FTIR, XRD, FESEM, EDX and BET were used to characterize theadsorbents prepared. BET surface areas of MSNs, NZVI, and NZVI/MSNs were 126, 41, and 72 m 2 /g for, respectively. The performance of NZVI/MSNs as adsorbent was examined by adsorption of methylene blue (MB), performed in series of batch experiments. In the kinetic studies, pseudo first order and pseudo second order kinetic models were examined. The pseudo second order equation provided the best fit with the experimental data. Thermodynamic studies indicated that the adsorption process is endothermic with ΔH° was 90.53 kJ/mol. Positive ΔS° (300 J/mol) and negative ΔG° (-6.42 kJ/mol) was recorded, indicating the spontaneous of the adsorption process and naturally favorable.

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Hydrogen storage in ordered and disordered phenylene-bridged mesoporous organosilicas

Kalantzopoulos

Enotiadis

Maccallini

et al. 2014

International Journal of Hydrogen Energy

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Naphthalene-based periodic nanoporous organosilicas: I. Synthesis and structural characterization

Cited by 7 publications

References 59 publications

Color-Tunable Fluorescence and White Light Emission from Mesoporous Organosilicas Based on Energy Transfer from 1,8-Naphthalimide Hosts to Perylenediimide Guests

Color-Tunable Fluorescence and White Light Emission from Mesoporous Organosilicas Based on Energy Transfer from 1,8-Naphthalimide Hosts to Perylenediimide Guests

Kinetic and Thermodynamics of Methylene Blue Adsorption onto Zero Valent Iron Supported on Mesoporous Silica

Hydrogen storage in ordered and disordered phenylene-bridged mesoporous organosilicas

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