Photon-gated spectral hole burning by donor-acceptor electron transfer in poly(methylmethacrylate) copolymers containing covalently bound chloroanthracene and doped tetraphenylporphine

Suzuki, H.; Nishi, Toshihiro; Shimada, Toshiyuki; Hiratsuka, Hiroaki

doi:10.1016/0022-2313(92)90154-2

Cited by 7 publications

(5 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Φ 1 ‘ = 4 in the case of β-bromonaphthalene additive (Figure in ref ) and Φ 1 ‘ = 10 or even 100 in the presence of p -benzoquinone (Figures and a in ref , respectively). In a PMMA copolymer containing covalently bound 9-chloroanthracene every red light quantum causes bleaching of 10 H 2 TPP molecules (Figure in ref ). Obviously, the investigation of gated HB may be complicated by the one-quantum prototropic phototransformation in free-base porphyrins, which occurs in H 2 TPP with a high quantum yield (Φ 1 = (1.3 ± 0.5) × 10 -2 56 or 4 × 10 -3 57 ).…”

Section: Resultsmentioning

confidence: 99%

“…Rather puzzling gated HB characteristics have been reported for free-base tetraphenylporphine (H 2 TPP) in the presence of halogenated aromatic compounds 16 and p-benzoquinone 18 embedded in a PMMA host polymer (for a review, see ref 19). HB quantum yields with respect to the selective red light (645 nm) (Φ 1 ′) much higher than unity have been obtained.…”

Section: Resultsmentioning

confidence: 99%

“…The paper by Carter et al triggered intensive research of gated hole-burning materials in Japan − and more recently in China. − Unfortunately, as compared to ref , little improvement of hole-burning characteristics has been achieved. The only exception is the azido polymer matrix showing the gating ratio more than 10 3 .…”

Section: Introductionmentioning

confidence: 99%

“…In striking contrast to the conclusions of refs 2-11, the photon gating unequivocally indicates that the photooxidation of metalloporphyrins is a two-quantum process involving the triplet state, similar to classical two-quantum reactions of polycyclic arenes and aromatic amines under ultraviolet excitation. 14,15 The paper by Carter et al 13 triggered intensive research of gated hole-burning materials in Japan [16][17][18][19][20][21][22][23][24][25][26][27] and more recently in China. [28][29][30][31][32][33] Unfortunately, as compared to ref 13, little improvement of hole-burning characteristics has been achieved.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Renge

Wild

1997

J. Phys. Chem. A

View full text Add to dashboard Cite

Intermolecular photoprocesses in glassy solutions of magnesium octaethylporphine (MgOEP) and zinc tetrabenzoporphine (ZnTBP) have been investigated under one- and two-color irradiation between 8 and 80 K. The simultaneous exposure to the pulsed laser light in resonance with the 0−0 S1 ← S0 transition and the continuous blue light absorbed by the T n ← T1 transitions leads to a much faster hole burning than the irradiation with the laser light alone. This photon gating effect is observed in many reactive solvent glasses or the mixtures of a reactive component and the inert diluent. In solvent glasses containing electron acceptors (alkyl halogenides, tert-butyl peroxybenzoate, ethyl diazoacetate) the two-quantum photooxidation results in the bleaching of porphyrin absorption bands and formation of cation radical absorption at 650−700 nm (in the case of MgOEP). In the presence of electron donors (triethylamine) and alkenes the photoreaction can be observed only in the hole-burning regime because upon broad-band irradiation the intensity and position of the 0−0 band remain unchanged. The hole burning in these systems stems from sensitized photoprocesses leading to the rearrangement of pigment environment. The microscopic solvent shift of the zero-phonon transition frequency of the pigment following cis − trans isomerization of the alkene molecules or reversible electron transfer results in the formation of a dip in absorption. In this case “antiholes” are observed as a result of intensity redistribution within the 0−0 band. Depending on the height of the triplet level of the alkene, the sensitization can take place by means of triplet energy transfer from either the T n or T1 state (to cyclooctatetraene) of the pigment. The influence of concentration, chemical structure, reduction potential, and the height of triplet energy level of activators as well as the matrix properties on the efficiency of gated hole burning has been investigated. The reactivities of aliphatic halocarbons and amines, aromatic electron acceptors and donors, cyclic and linear olefins with and without electron-accepting substituents, and other compounds have been studied. The most efficient sensitizers have been selected and doped in the polymer films which are more convenient for the applications of spectral hole burning in optical data storage.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Renge

Wild

1997

J. Phys. Chem. A

View full text Add to dashboard Cite

show abstract

“…They are widely employed in studies of photophysics and photochemistry including intra-and interpolymer interactions of polymer bound fluorophores and polymer-sized molecular interaction. [19][20][21][22] In this paper, PAMB, an anthracene-containing copolymer prepared from 9-anthrylmethyl methacrylate (AMMA), methyl methacrylate (MMA) and n-butyl acrylate (BA) is reported and used for the sensor membrane construction. BA and MMA are selected in the preparation of the anthracene-containing copolymer for the following reasons.…”

mentioning

confidence: 99%

Optical fiber sensor for tetracycline antibiotics based on fluorescence quenching of covalently immobilized anthracene

Liu

Wang²,

Tang³

et al. 1998

Analyst

View full text Add to dashboard Cite

A new optical fiber sensor for tetracycline is fabricated with an anthracene-containing copolymer prepared from 9-anthrylmethyl methacrylate, methyl methacrylate and n-butyl acrylate (PAMB). The sensing relies on the fact that the fluorescence of the sensor membrane fabricated with PAMB can be strongly quenched by the tetracycline antibiotics extracted from the sample. The proposed sensor responds linearly in the measuring ranges 2.02 x 10(-7)-2.02 x 10(-4) mol l-1 tetracycline (TC), 2.00 x 10(-7)-2.03 x 10(-4) mol l-1 oxytetracycline (OTC) and 4.05 x 10(-7)-2.03 x 10(-4) mol l-1 doxycycline (DC) and has detection limits of 1.00 x 10(-7) mol l-1 for TC and OTC, and 2.00 x 10(-7) mol l-1 for DC. The leaching of anthracene from the sensor membrane was hindered by covalent immobilization, resulting in a drastically enhanced sensor lifetime. Moreover, the sensor can rapidly respond to the antibiotics of interest (ca. 30s) and exhibits good reproducibility, reversibility, and selectivity in the presence of some common pharmaceutical species as well as alkali and alkali-earth metal salts. The sensor was used for the direct assay of tetracycline antibiotics in commercial pharmaceutical preparations and urine. The results are comparable to those obtained by conventional spectrophotometry. The recovery for tetracycline antibiotics from urine samples is also satisfactory.

show abstract

Information Storage Materials, Optical

Kämpf¹,

Mergel²

2000

Kirk-Othmer Encyclopedia of Chemical Technology

View full text Add to dashboard Cite

In addition to the established magnetic mass storage media (floppy disk, hard disk, tape) optical mass storage media (CD‐ROM (compact disk‐read only memory), WORM (write once, read many times), EOD (erasable optical disk)) are increasingly used. Generally, magnetic and optical media do not compete, but complement each other due to their specific advantages. Progress in optical data storage technology is closely connected with the development of suitable materials. This article illustrates in detail the current state of the art and the ongoing development of materials for optical data storage. For the information layer of WORM disks, dyes with high ir absorption, low heat conductivity, and good solubility are required. Besides polymethine dyes, biaxially substituted silicon–naphthalocyanines are used; also combinations of metal complexes are employed. The magneto‐optical materials for EOD‐disks in MOR (magneto‐optical recording) technique are primarily ferrimagnetic ternary amorphous alloys of rare‐earth (RE) and transition‐metals (TM) (GdTbFe, TbFeCo, DyFeCo). Ferrites with spinel‐ or garnet‐structure, eg, rare‐earth iron‐garnets (RIG), are commercially unimportant mainly due to their high deposition temperature. Co/Pt‐multilayers (MLs) exhibit interesting properties, but are still waiting for commercial introduction. Research concentrates on exchange‐coupled RE‐TM layers, which permit a direct overwrite procedure. Phase‐change materials for EOD‐disks in PCR (phase‐change recording) technique are primarily ternary alloys (eg, GeSbTe, InSbTe). Research focuses on materials with fast crystallization in parallel with high stability even at numerous write/read/erase cycles. As substrate materials for CD‐ROM disks, end group‐modified bisphenol A–polycarbonate (BPA‐PC) is employed exclusively. For WORM and EOD disks mainly BPA‐PC and sometimes glass is applied.

show abstract

Photon-gated spectral hole burning by donor-acceptor electron transfer in poly(methylmethacrylate) copolymers containing covalently bound chloroanthracene and doped tetraphenylporphine

Cited by 7 publications

References 12 publications

Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Optical fiber sensor for tetracycline antibiotics based on fluorescence quenching of covalently immobilized anthracene

Information Storage Materials, Optical

Contact Info

Product

Resources

About