Draft:Maxwell J. Crossley
Where to get help
How to improve a draft
You can also browse Wikipedia:Featured articles and Wikipedia:Good articles to find examples of Wikipedia's best writing on topics similar to your proposed article. Improving your odds of a speedy review To improve your odds of a faster review, tag your draft with relevant WikiProject tags using the button below. This will let reviewers know a new draft has been submitted in their area of interest. For instance, if you wrote about a female astronomer, you would want to add the Biography, Astronomy, and Women scientists tags. Editor resources
|  |
Comment: While he is notable, the page needs a complete rewrite:1. We do not want a list of areas with opinions about their relevance. This is an encyclopedia, not a resume or essay, we do not want opinions.2. His career needs sources.3. There is no point to having so many subsections, merge them.4. Selected pubs must have full details, similarly patents.5. The "See all" section does not connect and should be removed.This is not everything. I will do a quick strikethrough to indicate some of the irrelevant parts, not all. Ldm1954 (talk) 13:00, 17 March 2026 (UTC)
Maxwell J. Crossley | |
|---|---|
| Citizenship | Australian |
| Known for | Porphyrin chemistry, supramolecular photophysics, molecular materials for solar energy conversion |
| Scientific career | |
| Fields | Organic chemistry, supramolecular chemistry, photochemistry |
| Institutions | University of Sydney |
Maxwell J. Crossley is an Australian chemist whose research has focused on porphyrin chemistry, supramolecular systems, photochemistry, and molecular materials for solar-energy conversion. His work spans organic synthesis, coordination chemistry, and molecular photophysics, particularly involving porphyrin-based architectures designed for light harvesting, catalysis, and molecular electronics.
Crossley’s research has contributed to the development of multiporphyrin arrays, dendritic chromophore assemblies, supramolecular photovoltaic systems, and photochemical upconversion processes. His work combines synthetic chemistry, spectroscopy, theoretical modelling, and nanoscale surface-science techniques to investigate electronic processes in complex molecular systems.
Career
[edit]Crossley has been associated with the School of Chemistry at the University of Sydney, where his research has focused on synthetic and photophysical studies of macrocyclic systems. His work has involved collaborations with researchers in photophysics, nanotechnology, catalysis, and materials science.
His research spans several interdisciplinary fields including molecular electronics, artificial photosynthesis, and solar-energy conversion.
He was named a Fellow of the Australian Academy of Science in 2001.[1][2]
Research
[edit]Porphyrin chemistry
[edit]A central theme of Crossley’s research has been the synthesis and study of porphyrin-based molecular architectures. Porphyrins are conjugated macrocycles that play key roles in biological systems such as haemoglobin and chlorophyll and are widely investigated as functional materials in catalysis, molecular electronics, and photochemistry.
Crossley has investigated strategies for constructing extended porphyrin arrays capable of controlled electronic communication between chromophores. In early work he reported the synthesis of a linearly conjugated tetrakisporphyrin system approximately 65 Å in length designed as a prototype molecular wire.[3]
Such structures have been investigated as models for one-dimensional conjugated molecular conductors relevant to molecular electronics.
Multiporphyrin assemblies and dendrimers
[edit]Crossley has studied electronic energy transfer in multiporphyrin arrays and dendritic macromolecules designed as artificial light-harvesting systems. Investigations using time-resolved fluorescence anisotropy demonstrated energy migration between porphyrin chromophores embedded in dendritic frameworks, showing how molecular architecture influences excitation transport.[4]
These systems serve as synthetic analogues of natural photosynthetic antenna complexes.
Photochemical upconversion
[edit]Crossley has contributed to research on photochemical upconversion based on triplet–triplet annihilation (TTA). In this process low-energy photons absorbed by sensitiser molecules generate triplet excited states that combine to produce higher-energy singlet states capable of emitting shorter-wavelength light.
Studies involving porphyrin sensitizers and rubrene emitters demonstrated significant annihilation efficiencies, suggesting that TTA systems could improve the utilisation of solar radiation in photovoltaic devices.[5]
Photochemical enhancement of solar cells
[edit]Research involving molecular upconversion systems has been applied to thin-film photovoltaic devices. Experiments with hydrogenated amorphous silicon solar cells demonstrated that molecular upconverter layers can convert long-wavelength photons into higher-energy light absorbable by the semiconductor, increasing light-harvesting efficiency.[6]
Supramolecular photovoltaic systems
[edit]Crossley has also contributed to research on supramolecular photovoltaic assemblies combining porphyrin dendrimers with fullerene electron acceptors. These systems mimic aspects of natural photosynthesis by integrating electron-donor chromophores and electron-acceptor molecules within organised nanoscale structures capable of generating photocurrent under illumination.[7]
Catalysis and single-molecule imaging
[edit]Crossley has collaborated on studies investigating porphyrin catalysts at surfaces using scanning tunnelling microscopy. These experiments enabled real-time imaging of catalytic oxidation reactions performed by individual manganese porphyrin molecules at a liquid–solid interface.[8]
Electronic structure of porphyrins
[edit]Crossley has also contributed to theoretical investigations of the electronic structure of porphyrins and chlorophylls using density functional theory and multiconfigurational quantum chemical methods. These studies supported the classical Gouterman model describing the absorption spectra of porphyrin chromophores.[9]
Patents
[edit]Crossley is listed as an inventor on patents related to organic electronic materials and porphyrin-based molecular systems.
- Organic electronic materials and devices (WO2005106965 A1).
- Porphyrin-based molecular systems (WO9705477 A1).
Selected publications
[edit]- Crossley, M. J.; Burn, P. L. (1991). Chemical Communications.
- Yeow, E. K. L.; Ghiggino, K. P.; Crossley, M. J. (2000). Journal of Physical Chemistry B.
- Hasobe, T.; Crossley, M. J. (2004). Advanced Materials.
- Hulsken, B.; Crossley, M. J. (2007). Nature Nanotechnology.
- Cheng, Y. Y.; Crossley, M. J. (2010). Physical Chemistry Chemical Physics.
See also
[edit]References
[edit]- ↑ "Max Crossley | Australian Academy of Science". science.org.au. Retrieved 2026-03-07.
- ↑ "New Fellows recognise Australian excellence". ABC News. 28 March 2001. Retrieved 2026-03-07.
One of the new Fellows, Professor Maxwell Crossley from the University of Sydney, described his election as a significant recognition of his work. "I'm pleased, not only for myself, but also for the many research workers and students who have collaborated with me over the years," he said. Professor Crossley was awarded the fellowship for his work on molecules called 'porphyrins' that are not only essential to life, but also have important possible applications in nanotechnology, biomimectics and computing technology.
- ↑ Crossley, Maxwell J.; Burn, Paul L. (1991). "An approach to porphyrin-based molecular wires: synthesis of a bis(porphyrin)tetraone and its conversion to a linearly conjugated tetrakisporphyrin system". Journal of the Chemical Society, Chemical Communications (21): 1569–1571. doi:10.1039/c39910001569.
- ↑ Yeow, Edwin K. L.; Ghiggino, Kenneth P.; Reek, Joost N. H.; Crossley, Maxwell J.; Bosman, Anton W.; Schenning, Albert P. H. J.; Meijer, E. W. (2000). "The dynamics of electronic energy transfer in novel multiporphyrin functionalized dendrimers: A time-resolved fluorescence anisotropy study". Journal of Physical Chemistry B. 104 (12): 2596–2606. Bibcode:2000JPCB..104.2596Y. doi:10.1021/jp993116u.
- ↑ Cheng, Yuen Yap; Khoury, Tony; Clady, Raphael; Tayebjee, Murad; Ekins-Daukes, Nicholas J.; Crossley, Maxwell J.; Schmidt, Timothy W. (2010). "On the efficiency limit of triplet–triplet annihilation for photochemical upconversion". Physical Chemistry Chemical Physics. 12 (1): 66–71. Bibcode:2010PCCP...12...66C. doi:10.1039/b913243k. PMID 20024445.
- ↑ Cheng, Yuen Yap; Fueckel, Burkhard; MacQueen, Rowan W.; Khoury, Tony; Clady, Raphael; Crossley, Maxwell J.; Stannowski, Bernd; Lips, Klaus; Schmidt, Timothy W. (2012). "Improving the light-harvesting of amorphous silicon solar cells with photochemical upconversion". Energy & Environmental Science. 5 (5): 6953–6959. Bibcode:2012EnEnS...5.6953C. doi:10.1039/c2ee21136j.
- ↑ Hasobe, Taku; Kashiwagi, Yukiyasu; Absalom, Mark A.; Sly, Joseph; Hosomizu, Kohei; Crossley, Maxwell J.; Imahori, Hiroshi; Kamat, Prashant V.; Fukuzumi, Shunichi (2004). "Supramolecular photovoltaic cells using porphyrin dendrimers and fullerenes". Advanced Materials. 16 (12): 975–979. Bibcode:2004AdM....16..975H. doi:10.1002/adma.200306519.
- ↑ Hulsken, Bas; Van Hameren, Richard; Gerritsen, Jan W.; Khoury, Tony; Thordarson, Pall; Crossley, Maxwell J.; Rowan, Alan E.; Nolte, Roeland J. M.; Elemans, Johannes A. A. W. (2007). "Real-time single-molecule imaging of oxidation catalysis at a liquid-solid interface". Nature Nanotechnology. 2 (5): 285–289. Bibcode:2007NatNa...2..285H. doi:10.1038/nnano.2007.106. PMID 18654285.
- ↑ Cai, Zheng-Li; Crossley, Maxwell J.; Reimers, Jeffrey R.; Kobayashi, Rika; Amos, Roger D. (2006). "Density functional theory for charge transfer: the nature of the N-bands of porphyrins and chlorophylls revealed through CAM-B3LYP calculations". Journal of Physical Chemistry B. 110 (31): 15624–15632. doi:10.1021/jp063376t. PMID 16884287.
Authority control databases – Maxwell J Crossley | |
|---|---|
| Academics | |
| People | |
Category:Australian chemists Category:Organic chemists Category:Supramolecular chemists Category:University of Sydney faculty Category:Living people
- summarize secondary sources: do not offer your own analysis or arguments;
- be written from a neutral point of view: represent the subject without bias, avoiding praise, criticism, or persuasive or promotional language;
- not contain original research: do not include new theories, unpublished ideas, or personal experiences.
Instead, only summarize in your own words a range of independent, reliable, published sources that discuss the subject.