Research and Development

@article{Peruelo2017,

title = {Preparation, characterization of chitosan/bamboo charcoal/poly(methacrylate) composite beads},

author = {Dorothy Caminos-Peruelo and Wei-Chieh Wang and Tsung-Shune Chin and Regina C. So and Ronaldo M. Fabicon and Ming-Fa Hsieh},

url = {https://link.springer.com/article/10.1007/s12034-017-1464-3},

doi = {10.1007/s12034-017-1464-3},

year  = {2017},

date = {2017-09-22},

journal = {Bulletin of Materials Science},

volume = {40},

pages = {1179-1187},

abstract = {Preparation and characterization of a low-cost, novel steam-activated bamboo charcoal (BC) and poly(methacrylate) (PMAA) bound with chitosan (CTS) to form chitosan/bamboo charcoal/poly(methacrylate) (CTS/BC/PMAA) composite beads is reported for the first time in this paper. The characteristics are revealed by techniques such as X-ray photoelectron spectroscopy (XPS), thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC), scanning electron microscopy (SEM), Brunauer Emmett Teller (BET), solution pH and pH at point of zero charge (pHpzc). The composite beads possessed a dominant acidic surface group of 0.663 mmol g−1, as revealed by Boehm titration method. This acidity was confirmed by its solution pH of 6.46; pHpzc of 6.70 and increase in oxygen surface via XPS analysis. N2 adsorption–desorption isotherms at 77 K of the beads revealed high BET surface area (SA) of 681.15 m2g−1. Langmuir model affords a SA of 773.34 m2g−1. SEM showed the microporous nature of the composite beads. The properties of CTS/BC/PMAA composite beads were compared to CTS/BC and neat BC. Thermal stability and successful coating of 5.1 wt% of PMAA and 6.8 wt% of CTS to CTS/BC/PMAA beads were shown by DSC and TGA analyses. The composite beads showed low carbon particle released at pH 7.4 and 6.8. Furthermore, dynamic adsorption revealed that CTS/BC/PMAA composite beads can be used to capture a polar substance, such as creatinine.},

keywords = {bamboo charcoal/chitosan/polymethacrylate, characterization, column adsorbent, composite beads, creatinine, pH point of zero charge},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon2001b,

title = {Formation of Coordinated RZn(macrocycle)+ Cations and Organozincate Anions from Reactions of Organozinc Compounds and Macrocycles},

author = {Ronaldo M. Fabicon and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/abs/10.1021/om0102798},

doi = {10.1021/om0102798},

year  = {2001},

date = {2001-08-07},

journal = {Organometallics},

volume = {20},

number = {19},

pages = {4018-4023},

abstract = {An RZnZ compound (R = alkyl) and a macrocycle react in benzene to form RZn(macrocycle)+ ions when the macrocycle is an effective coordinator for RZn+ and Z- can exist as the anion or become attached to an organometallic acceptor to form an organometalate anion. R2Zn and R3Al form RZn(macrocycle)+R4Al- with 14N4 (1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane), 15N5 (1,4,7,10,13-pentamethyl-1,4,7,10,13-pentaazacyclopentadecane), 2,1,1-cryptand, or 2,2,1-cryptand but not with 1,4,7,10,13,16-hexamethyl-1,4,7,10,13,16-hexaazacyclooctadecane, 2,2,2-cryptand, 15-crown-5, or 18-crown-6. RZnZ, R2Zn, and 14N4 form RZn(14N4)+R2ZnZ- when Z is Cl, Br, I, or 3,5-di-tert-butylphenoxy but not when Z is tert-butoxy. Various combinations of RZnZ with Z = Cl, Br, I, 2,6-di-tert-butylphenoxy, or 3,5-di-tert-butylphenoxy and 14N4, 15N5, 2,1,1-cryptand, or 2,2,1-cryptand form RZn(macrocycle)+Z- solids; solids do not form when Z is methoxy or tert-butoxy nor when the macrocycle is 12-crown-4, 15-crown-5, or 18-crown-6.},

keywords = {absorption, anions, ions, macrocycles, nuclear magnetic resonance spectroscopy},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon2001,

title = {Formation of organozincate species from diorganozinc compounds and salts},

author = {Ronaldo M. Fabicon and Herman G. Richey Jr.},

url = {https://pubs.rsc.org/en/content/articlelanding/2001/dt/b009126j},

doi = {10.1039/B009126J},

year  = {2001},

date = {2001-02-16},

journal = {Journal of the Chemical Society, Dalton Transactions},

number = {6},

pages = {783-788},

abstract = {Stirring a benzene solution of a diorganozinc compound with an insoluble alkali metal alkoxide (MeOK or MeONa) or potassium amide (PhN(Me)K) formed a solution containing a species having a salt ∶ R2Zn composition of 1 ∶ 2. A salt (t-BuOK) that is soluble in benzene also forms a 1 ∶ 2 species and, when the salt to R2Zn ratio is sufficiently high, forms a 1 ∶ 1 species. Controlled heating at reduced pressure of solutions prepared from an alkali metal alkoxide and an excess of a diorganozinc compound leaves materials with alkoxide ∶ R2Zn ratios of 1 ∶ 2 or 1 ∶ 1. Reactions of benzene solutions of diorganozinc compounds with ( p-MeC6H4)SK or Ph2PK form solutions of composition R3ZnK.},

keywords = {-},

pubstate = {published},

tppubtype = {article}

}

@article{Pajerski2000,

title = {Reactions of Grignard Reagents with an Azacrown Ether; Formation of RMg(14N4)+ and XMg(14N4)+ Cations and RnMgX3-n- and X- Anions},

author = {Anthony D. Pajerski and John E. Chubb and Ronaldo M. Fabicon and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/10.1021/jo991666i},

doi = {10.1021/jo991666i},

year  = {2000},

date = {2000-03-16},

journal = {The Journal of Organic Chemistry},

volume = {65},

number = {7},

pages = {2231-2235},

keywords = {cations, hydrocarbons aromatic compounds anions absorption},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon1999,

title = {Interactions of Organozinc Compounds with Crown Ethers and Cryptands:  Formation of R2Zn(18-crown-6) Rotaxanes},

author = {Ronaldo M. Fabicon and Masood Parvez and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/abs/10.1021/om990468e},

doi = {10.1021/om990468e},

year  = {1999},

date = {1999-11-01},

journal = {Organometallics},

volume = {18},

number = {24},

pages = {5163-5169},

abstract = {Several pieces of evidence indicate that R2Zn(18-crown-6) rotaxanes are components of solutions prepared from some R2Zn (R = alkyl or aryl) compounds and 18-crown-6, and crystal structures show that Et2Zn(18-crown-6) and Ph2Zn(18-crown-6) solids that precipitate from such solutions have rotaxane structures. By contrast, the R2Zn compounds do not form rotaxanes with 15-crown-5 or its nitrogen equivalent, 1,4,7,10,13-pentamethyl-1,4,7,10,13-pentaazacyclopentadecane. Disproportionation of R2Zn by macrocycles to form coordinated RZn+ cations and R3Zn- anions is less favorable than the corresponding reaction with R2Mg, although Tol2Zn (Tol = p-methylphenyl) and 2,1,1-cryptand do form TolZn(2,1,1-cryptand)+Tol3Zn-.},

keywords = {absorption, chemical structure, ethers, macrocyclic compounds, rotaxanes},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon1993,

title = {Reactions of Grignard reagents with an azacrown ether: syntheses of RMg(14N4)+RMgX2- and RMg(14N4)+X-},

author = {Ronaldo M. Fabicon and Anthony D. Pajerski and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/pdf/10.1021/ja00073a077},

doi = {10.1021/ja00073a077},

year  = {1993},

date = {1993-10-01},

journal = {Journal of the American Chemical Society},

volume = {115},

number = {20},

pages = {9333-9334},

keywords = {-},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon1991,

title = {Formation of organozinc cations and anions from diorganozinc compounds},

author = {Ronaldo M. Fabicon and Anthony D. Pajerski and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/pdf/10.1021/ja00017a053},

doi = {10.1021/ja00017a053},

year  = {1991},

date = {1991-08-01},

journal = {Journal of the American Chemical Society},

volume = {113},

number = {17},

pages = {6680-6681},

keywords = {-},

pubstate = {published},

tppubtype = {article}

}

@article{Fabicon1991b,

title = {Formation of organozincate ions from diorganozinc compounds and potassium alkoxides},

author = {Ronaldo M. Fabicon and Masood Parvez and Herman G. Richey Jr.},

url = {https://pubs.acs.org/doi/abs/10.1021/ja00004a053},

doi = {10.1021/ja00004a053},

year  = {1991},

date = {1991-02-01},

journal = {Journal of the American Chemical Society},

volume = {113},

number = {4},

pages = {1412-1414},

keywords = {-},

pubstate = {published},

tppubtype = {article}

}