Jayasundera, KP, Engels, TGW, Lun, DJ, Mungalpara, MN, Plieger, PG & Rowlands, GJ 2017, 'The synthesis of planar chiral pseudo-gem aminophosphine pre-ligands based on [2.2]paracyclophane', Organic and Biomolecular Chemistry, vol. 15, no. 42, pp. 8975-8984.View/Download from: UTS OPUS or Publisher's site
© 2017 The Royal Society of Chemistry. The synthesis of three planar chiral pseudo-gem disubstituted [2.2]paracyclophane-derived P,N-pre-ligands is reported along with preliminary results of their activity in the amination of aryl bromides and chlorides. The pseudo-gem aminophosphines were capable of mediating the coupling reaction at a loading of 1 mol%.
Jayasundera, KP, Kusmus, DNM, Deuilhe, L, Etheridge, L, Farrow, Z, Lun, DJ, Kaur, G & Rowlands, GJ 2016, 'The synthesis of substituted amino[2.2]-paracyclophanes', ORGANIC & BIOMOLECULAR CHEMISTRY, vol. 14, no. 46, pp. 10848-10860.View/Download from: Publisher's site
Syaifudin, ARM, Jayasundera, KP & Mukhopadhyay, SC 2009, 'A low cost novel sensing system for detection of dangerous marine biotoxins in seafood', SENSORS AND ACTUATORS B-CHEMICAL, vol. 137, no. 1, pp. 67-75.View/Download from: Publisher's site
Jiang, X, Waterland, M, Blackwell, L, Wu, Y, Jayasundera, KP & Partridge, A 2009, 'Sensitive determination of estriol-16-glucuronide using surface plasmon resonance sensing', STEROIDS, vol. 74, no. 10-11, pp. 819-824.View/Download from: Publisher's site
Jayasundera, KP, Brodie, SJ & Taylor, CM 2007, 'Synthesis of a transition-state analog for the hydrolysis of the zearalenone lactone', TETRAHEDRON, vol. 63, no. 40, pp. 10077-10082.View/Download from: Publisher's site
Jayasundera, KP, Watson, AJ & Taylor, CM 2005, 'Synthesis of a tetrasubstituted arylphosphonate via the anionic phospho-Fries rearrangement', TETRAHEDRON LETTERS, vol. 46, no. 25, pp. 4311-4313.View/Download from: Publisher's site
Takeda, S, Jayasundera, KP, Kakiuchi, T, Kinoshita, H & Inomata, K 2001, 'An efficient method for the conversion of 2-bromo-5-tosylpyrroles to the corresponding 5-tosylpyrrolinones as the D-ring of phycocyanobilin derivatives', CHEMISTRY LETTERS, no. 6, pp. 590-591.View/Download from: Publisher's site
Hanzawa, H, Inomata, K, Kinoshita, H, Kakiuchi, T, Jayasundera, KP, Sawamoto, D, Ohta, A, Uchida, K, Wada, K & Furuya, M 2001, 'In vitro assembly of phytochrome B apoprotein with synthetic analogs of the phytochrome chromophore', Proceedings of the National Academy of Sciences of the United States of America, vol. 98, no. 6, pp. 3612-3617.View/Download from: Publisher's site
Phytochrome B (PhyB), one of the major photosensory chromoproteins in plants, mediates a variety of light-responsive developmental processes in a photoreversible manner. To analyze the structural requirements of the chromophore for the spectral properties of PhyB, we have designed and chemically synthesized 20 analogs of the linear tetrapyrrole (bilin) chromophore and reconstituted them with PhyB apoprotein (PHYB). The A-ring acts mainly as the anchor for ligation to PHYB, because the modification of the side chains at the C2 and C3 positions did not significantly influence the formation or difference spectra of adducts. In contrast, the side chains of the B- and C-rings are crucial to position the chromophore properly in the chromophore pocket of PHYB and for photoreversible spectral changes. The side-chain structure of the D-ring is required for the photoreversible spectral change of the adducts. When methyl and ethyl groups at the C17 and C18 positions are replaced with an n-propyl, n-pentyl, or n-octyl group, respectively, the photoreversible spectral change of the adducts depends on the length of the side chains. From these studies, we conclude that each pyrrole ring of the linear tetrapyrrole chromophore plays a different role in chromophore assembly and the photochromic properties of PhyB.
Ohta, A, Sawamoto, D, Jayasundera, KP, Kinoshita, H & Inomata, K 2000, 'Efficient synthesis of B- and C-rings components of phycobilin derivatives for structure/function analysis of phytochrome', CHEMISTRY LETTERS, no. 5, pp. 492-493.View/Download from: Publisher's site
Jayasundera, KP, Kinoshita, H & Inomata, K 2000, 'An efficient method to construct the A,B-rings component toward total syntheses of phycocyanobilin and its derivative as a photoprobe', BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, vol. 73, no. 2, pp. 497-505.View/Download from: Publisher's site
Masukawa, T, Kato, H, Kakiuchi, T, Jayasundera, KP, Kinoshita, H & Inomata, K 1998, 'Controlled synthesis of C/D-ring components of phycobilin derivatives bearing a photoreactive group at D-ring', CHEMISTRY LETTERS, no. 5, pp. 455-456.View/Download from: Publisher's site
Kakiuchi, T, Kato, H, Jayasundera, KP, Higashi, T, Watabe, K, Sawamoto, D, Kinoshita, H & Inomata, K 1998, 'Total syntheses of (+/-)-phycocyanobilin and its derivatives bearing a photoreactive group at D-ring', CHEMISTRY LETTERS, no. 10, pp. 1001-1002.View/Download from: Publisher's site
Mohd Syaifudin, AR, Jayasundera, KP & Mukhopadhyay, SC 2011, 'Novel planar interdigital sensors for detection of domoic acid in seafood', Lecture Notes in Electrical Engineering, pp. 253-278.View/Download from: Publisher's site
A novel planar interdigital sensor based sensing system has been developed for detection of dangerous marine biotoxins in seafood. Our main objective is to sense the presence of dangerous contaminated acid in mussels and other seafoods. Initial studies were conducted with three peptide derivatives namely Sarcosine, Proline and Hydroxylproline. These three chemicals are structurally closely related to our target molecule. The proline molecule is arguably the most important amino acid in peptide conformation, contains the basic structural similarity to the domoic acid. Three novel interdigital sensors have been designed and fabricated. All sensors have the same effective area but having different sensor configurations. The initial results show that sensors respond very well to the chemicals and it is possible to discriminate the different chemicals from the output of the sensor. The sensors were also being tested with three seafood products. Results from the analysis have shown that sensor with configuration #1 (Sensor-1) has better sensitivity compared to other sensors. Sensor-1 was chosen for experiment using proline and mussels. The changes in sensor sensitivity were analysed with mussels before and after adding the proline. The presence of proline on the mussel surface and also injected proline to the mussels was very clearly detected by the sensor. Further experiment was conducted with small amount of domoic acid (0.5 μg to 5.0 μg) injected to a mussel and it was found that Sensor-1 was able to detect small amount of domoic acid (1.0 μg) injected into the mussel sample. The result shows that Sensor-1 was able to detect approximately 12.6 μg/g of domoic acid in mussel meat. Three threshold levels of particular sample thickness have been established for detection of domoic acid. The first prototype of a low cost sensing system known as SIT (Seafood Inspection Tool) has been developed. The outcomes from the experiments provide chances of opportunity for further r...
Syaifudin, ARM, Yunus, MA, Mukhopadhyay, SC & Jayasundera, KP 2009, 'A Novel Planar Interdigital Sensor for Environmental Monitoring', 2009 IEEE SENSORS, VOLS 1-3, 8th IEEE Conference on Sensors, IEEE, Christchurch, NEW ZEALAND, pp. 105-+.
Mohd. Syaifudin, AR, Jayasundera, KP & Mukhopadhyay, SC 2009, 'A novel planar interdigital sensor based sensing and instrumentation for detection of dangerous contaminated chemical in seafood', 2009 IEEE Intrumentation and Measurement Technology Conference, I2MTC 2009, pp. 701-706.View/Download from: Publisher's site
A novel planar interdigital sensor based sensing and instrumentation system has been developed for detection of dangerous contaminated chemicals in seafood. Three novel interdigital sensors have been designed and fabricated. The sensors were designed with different configurations and analyses of all sensors were conducted from the experiments in order to select the best sensor for further analysis with domoic acid. Initial studies were conducted with Proline which is structurally close related to our target molecule, domoic acid. The changes in sensor sensitivity were analysed with mussels before and after adding the proline. The presence of proline on the mussel surface and also inside the mussel was very clearly detected by the sensor. Further experiment was conducted with small amount of domoic acid (0.5 μg to 5.0 μg) and it was found that Sensor-1 was able to detect approximately 12.6 μg/g of DA in mussel meat. Results of the effect of water and different concentration of domoic acid were also carried out and presented. Threshold levels of sensor's sensitivity with different mussel thickness were established. The outcomes from the experiments have shown that novel interdigital sensing system has the potential to be one of the options to assess the quality of seafood products for in-situ monitoring. © 2009 IEEE.
Syaifudin, ARM, Mukhopadhyay, SC & Jayasundera, KP 2008, 'Electromagnetic Interaction of Planar Interdigital Sensors with Chemicals Contaminated in Seafood', PROCEEDINGS OF THE THIRD INTERNATIONAL CONFERENCE ON SENSING TECHNOLOGY, 3rd International Conference on Sensing Technology, IEEE, Natl Cheng Kung Univ, Tainan, TAIWAN, pp. 620-+.