Synthesis of Multiporphyrin Containing Hyperbranched Polymers

Twyman, Lance J.; Ellis, Adam; Gittins, Peter J.

doi:10.1021/ma200863u

Cited by 22 publications

(29 citation statements)

References 38 publications

(46 reference statements)

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“…The excited state absorption is possibly caused by singlet state (S 1 ) of the molecules under our experimental conditions (picoseconds), rather than triplet state (T 1 ) via an intersystem crossing (ISC) process, which would require nanosecond time scales. 9 The nonlinear absorption coefficient a 2 increased from Por-PAEK-5% to Por-PAEK-25% due to the higher chromophore content per unit volume, this tendency was discovered in Figure 6; Por-PAEK-25% showed the deepest valley (lowest transmittance) and the largest third-order nonlinear susceptibility at the same sample concentration of 0.5 mg mL 21 . The linear transmittance of the copolymers was 79, 70, 61, 56, and 52%, respectively.…”

Section: Nonlinear Optical and Optical Limiting Propertiesmentioning

confidence: 80%

“…UV-visible absorption and fluorescence emission spectra were recorded on a UV2501-PC spectrophotometer and Shimadzu RF-3501 fluorescence spectrophotometer, respectively. The mechanical properties of thin films [rectangular films of 45.0 (length) 3 5.0 (width) 3 0.1 (thickness) mm 3 , cast from NMP solvents onto the glass plates, followed by heating at 120 C in vacuo], were evaluated at room temperature on a Shimadzu AG-I Universal Tester at a strain rate of 10 mm min 21 . All the films were tested at least five times.…”

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confidence: 99%

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Synthesis and optical properties of poly(aryl ether ketone)s incorporating porphyrins in the backbones

Zhang

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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A series of novel soluble poly(aryl ether ketone)s (PAEKs) based on 5,10-bis(4-hydroxyphenyl)215,20-diphenylporphyrin (cis-DHTPP), 4,4 0 -(hexafluoroisopropylidene) diphenol (6FBPA) and 4,4 0 -difluorobenzophenone (DFB) were synthesized and characterized by FT-IR, 1 H-NMR, UV-vis and fluorescence spectroscopies. The intrinsic photophysical properties of porphyrins were preserved because of the absence of photoinduced electron transfer in the polymer chains. Investigation of the copolymers thermal properties indicated that these polymers had high glass transition temperatures and excellent thermal stabilities. The results of Z-scan and optical limiting measurements manifested that incorporation of the porphyrin chromophore into the main chain engendered the novel PAEKs with superior nonlinear optical properties and optical limiting function, which could be effectively tuned by varying the molar ratio of porphyrin monomers.

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Section: Nonlinear Optical and Optical Limiting Propertiesmentioning

confidence: 80%

mentioning

confidence: 99%

Synthesis and optical properties of poly(aryl ether ketone)s incorporating porphyrins in the backbones

Zhang

et al. 2014

J. Polym. Sci. Part A: Polym. Chem.

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“…TCPP and 3,5-diacetoxybenzoic acid precursors used to form a hyperbranched polymer structure, shown as a representative two-dimensional structure. 52 they used a hydrazide-substituted Zn porphyrin coordinated with Zn ions. In both reports the side-chain coordination polymers outperformed the corresponding monomeric units, but the highest overall conversion efficiency was 1.75%.…”

Section: Coordination Polymersmentioning

confidence: 99%

“…Post-polymerization metallation was achieved with both zinc and iron and monitored with UV-visible absorption spectroscopy. 52 Lovell et al created a porphyrin-crosslinked hydrogel for fluorescence monitoring by reacting TCPP with poly(ethylene glycol) (PEG) spacers functionalized with diamine (Fig. 19).…”

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confidence: 99%

Porphyrin polymers and organic frameworks

Day

Wamser

Walter

2015

Polymer International

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The versatility of porphyrins as optoelectronic or catalytic units makes them attractive elements for inclusion in functional materials. Polymers that include porphyrins have been created with a wide variety of structures and used in a wide range of applications. This review covers recent developments in the synthesis, characterization and applications of polymeric materials in which porphyrins are key components of the repeat units, including the rapidly growing area of metal-organic frameworks and related covalent organic frameworks. © 2015 Society of Chemical Industry Keywords: review; porphyrin; metal-organic framework; covalent organic framework PORPHYRINS AS FUNCTIONAL BUILDING BLOCKSThe porphyrin ring and its many structural relatives are common functional units in both natural and synthetic systems (Fig. 1). Porphyrins have a variety of properties that allow them to be useful in applications, especially their broad-ranging optoelectronic and catalytic capabilities. Furthermore, these properties are readily modulated by incorporation of various metals inside the ring or by substituent effects at various locations around the ring. In many cases, nature provides guidance for specific structure-function correlations and applications -the so-called biomimetic approaches. In nature, porphyrin (heme) units are typically embedded in a biological matrix that controls the environment of and access to the porphyrin. In synthetic systems, porphyrins in polymeric matrices have been developed in similar fashion to help control the specific application.In this review, we briefly cite previous reviews and summarize recent results regarding the synthesis, structure, properties and applications of polymeric porphyrins. We only include polymers that contain multiple porphyrin units as an integral part of the polymer, as opposed to polymeric matrices that are simply used to encapsulate individual porphyrin units. We also cover the rapidly growing field of metal-organic frameworks (MOFs) and covalent organic frameworks (COFs), where they specifically include porphyrins as a key component of the framework. Structures related to porphyrins (phthalocyanines, corroles, chlorins, etc.) and porphyrin dimers are not covered, but some porphyrin oligomers are discussed; reviews on many of these are available in the comprehensive series Handbook of Porphyrin Science.

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“…Twyman et al also studied porphyrin-core hyperbranched dendrimer used as protein model. [2][3][4] Dendrimers are also divided according to different generation numbers and their multiply functions derive from different branched units and generation numbers. Generation numbers depend on repeated branched cycles which are performed during synthetic procedure.…”

Section: Introductionmentioning

confidence: 99%

Advances in Applications of Dendritic Compounds

Ma²,

Deng³

et al. 2013

j. nanosci. nanotech.

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Dendritic compounds (so-called dendrimers) with nano-scale represent unique symmetric and spherical structures. They are usually prepared through two fundamental methods based on molecular level which involved the convergent method and divergent method, although the synthetic methods have a tendency towards the diversity and functionalization. The outershell of dendrimers with rich peripheral reactive sites are easily modified by small functional molecules. Moreover, the higher generation dendrimers also possess more exposed functional groups on the surface prior to the previous one and they are much easily customized for much more applications. Consequently, based on previous researches, this review summarized wide applications of dendritic compounds in many fields which were investigated in detail, including gene vector, drug carrier, catalysis, sensor industry, photoelectric material, etc. Dendrimers provide promising tools for the cellular delivery of molecular cargos ranging in size from small molecules and peptides to proteins and DNA. More importantly, it is necessary to explore new synthetic methods and undiscovered applications of new dendrimers.

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Synthesis of Multiporphyrin Containing Hyperbranched Polymers

Cited by 22 publications

References 38 publications

Synthesis and optical properties of poly(aryl ether ketone)s incorporating porphyrins in the backbones

Synthesis and optical properties of poly(aryl ether ketone)s incorporating porphyrins in the backbones

Porphyrin polymers and organic frameworks

Advances in Applications of Dendritic Compounds

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