title: Electrochemistry of ferrocenylphosphines FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN), and some phosphine oxide, phosphine sulfide, phosphonium and metal complex derivatives

authors: Downard, Alison J.

subjects: ferrocenyl group

abstract: Electrochemical studies of the free ferrocenylphosphine ligands FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN) and some phosphine oxide, phosphine sulfide, phosphonium and metal derivatives are described. The free ligands exhibit complex voltammetric responses due to participation of the phosphorus lone pair in the redox reactions. Uncomplicated ferrocene-based redox chemistry is observed for PV derivatives and when the ligands are coordinated in complexes cis-PtCl₂[FcCH₂P(CH₂OH)₂], PdCl₂[FcCH₂P(CH₂OH)₂], [Au{FcCH₂P(CH₂OH)₂}₂]Cl, RuCl₂(η⁶-C₁₀H₁₄)[FcCH₂P(CH₂OH)₂] and RuCl₂(η⁶-C₁₀H₁₄)(FcCH₂PPh₂). The reaction pathways of the free ligands after one-electron oxidation have been examined in detail using voltammetry, NMR spectroscopy and electrospray mass spectrometry. Direct evidence for formation of a P---P bonded product is presented.

text: Electrochemistry of ferrocenylphosphines FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN), and some phosphine oxide, phosphine sulfide, phosphonium and metal complex derivatives Electrochemical studies of the free ferrocenylphosphine ligands FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN) and some phosphine oxide, phosphine sulfide, phosphonium and metal derivatives are described. The free ligands exhibit complex voltammetric responses due to participation of the phosphorus lone pair in the redox reactions. Uncomplicated ferrocene-based redox chemistry is observed for PV derivatives and when the ligands are coordinated in complexes cis-PtCl₂[FcCH₂P(CH₂OH)₂], PdCl₂[FcCH₂P(CH₂OH)₂], [Au{FcCH₂P(CH₂OH)₂}₂]Cl, RuCl₂(η⁶-C₁₀H₁₄)[FcCH₂P(CH₂OH)₂] and RuCl₂(η⁶-C₁₀H₁₄)(FcCH₂PPh₂). The reaction pathways of the free ligands after one-electron oxidation have been examined in detail using voltammetry, NMR spectroscopy and electrospray mass spectrometry. Direct evidence for formation of a P---P bonded product is presented.

year: 2003

title: A power sharing series power BJT array with isolated low voltage control for AC power control applications

authors: Kularatna, Nihal

subjects: AC power control

abstract: A technique for a continuously variable AC resistance using a series BJT array is presented. This array provides high power dissipation capability and uniform voltage and power distribution across the individual transistors. The array, controlled using a set of optoisolators to maintain the electrical isolation between the control circuits and the power stage, could be used as the basis to develop several useful techniques including a solid state AC regulator with comparable performance to the commonly used ferro-resonant systems; a linear AC electronic load suitable for testing UPS and other power conditioners; and, in other AC power control applications such as switching capacitors in AC resonant circuits.

text: A power sharing series power BJT array with isolated low voltage control for AC power control applications A technique for a continuously variable AC resistance using a series BJT array is presented. This array provides high power dissipation capability and uniform voltage and power distribution across the individual transistors. The array, controlled using a set of optoisolators to maintain the electrical isolation between the control circuits and the power stage, could be used as the basis to develop several useful techniques including a solid state AC regulator with comparable performance to the commonly used ferro-resonant systems; a linear AC electronic load suitable for testing UPS and other power conditioners; and, in other AC power control applications such as switching capacitors in AC resonant circuits.

year: 2006

title: Leadership in motion

authors: Nikora, Linda Waimarie

abstract: He honore, he kororia, maungarongo ki te whenua, whakaaro pai ki nga tangata katoa…pai marire. Paimarie kia ratou kua wheturangitia, ki te maunga tapu ki Taupiri, te okiokinga a to tatou Arikinui, Te Ataarangikaahu. Moe mai, e Rangi. A, ki tana tama, Kingi Tuheitia, me te kahui ariki kei waenganui i a tatou, kei te mihi. Kia a koe Linda, nau te whakamoemiti ki te rungarawa. Tena koe. E te tumuaki, Vice Chancellor, nga mihi o te ata ki a koe. Mauri ora kia tatou katoa. 
When I received the invitation to attend this WILD event, I was both intrigued by the possibilities that such a day might bring, and challenged by the topic that organisers wanted me to speak to. Imagining a small informal and conversational gathering of women, I accepted the invitation. Time passed and I duly received a request for a biographical statement and title of my talk. The event was promoted and in the promotional material, what stood out between circling ruby red panic lights was the venue, PWC. The largest lecture theatre on campus. This was not going to be a talk over a cosy cup of tea. So, what do academics do when they’re stressed and feeling a bit rattled? We prepare papers. So this paper responds to an invitation to speak about leadership (personally and/or professionally)”. I chose the “personally” option, sort of.

text: Leadership in motion He honore, he kororia, maungarongo ki te whenua, whakaaro pai ki nga tangata katoa…pai marire. Paimarie kia ratou kua wheturangitia, ki te maunga tapu ki Taupiri, te okiokinga a to tatou Arikinui, Te Ataarangikaahu. Moe mai, e Rangi. A, ki tana tama, Kingi Tuheitia, me te kahui ariki kei waenganui i a tatou, kei te mihi. Kia a koe Linda, nau te whakamoemiti ki te rungarawa. Tena koe. E te tumuaki, Vice Chancellor, nga mihi o te ata ki a koe. Mauri ora kia tatou katoa. 
When I received the invitation to attend this WILD event, I was both intrigued by the possibilities that such a day might bring, and challenged by the topic that organisers wanted me to speak to. Imagining a small informal and conversational gathering of women, I accepted the invitation. Time passed and I duly received a request for a biographical statement and title of my talk. The event was promoted and in the promotional material, what stood out between circling ruby red panic lights was the venue, PWC. The largest lecture theatre on campus. This was not going to be a talk over a cosy cup of tea. So, what do academics do when they’re stressed and feeling a bit rattled? We prepare papers. So this paper responds to an invitation to speak about leadership (personally and/or professionally)”. I chose the “personally” option, sort of.

year: 2015