Efficacy of novel organotin(IV) complexes on non-durable tropical wood against decay fungi
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ORIGINALS ORIGINALARBEITEN
Efficacy of novel organotin(IV) complexes on non-durable tropical wood against decay fungi Md. Masudur Rahman • Ismail Jusoh • Md. Abu Affan • Ahmad Husaini • Sinin Hamdan
Received: 2 October 2012 / Published online: 16 May 2013 Ó Springer-Verlag Berlin Heidelberg 2013
Abstract Interest in organotin(IV) compounds is increasing due to their interesting structural features and possession of biological activities. The objective of this study was to determine the efficacy of novel organotin(IV) complexes against Trametes versicolor and Gloeophyllum trabeum decay fungi. Soil block decay test was performed using T. versicolor and G. trabeum for 16 weeks. Ten 19 9 19 9 19 mm3 sized wood cubes of Alstonia scholaris, Macaranga triloba and Hevea brasiliensis were treated with three levels of concentration (0.1, 0.5 and 1 %) of monomethyltin(IV) (MMT) and monophenyltin(IV) (MPT) of monosubstituted organotin(IV) and dimethyltin(IV) (DMT), diphenyltin(IV) (DPT) and dibutyltin(IV) (DBT) of disubstituted organotin(IV) complexes with 2-acetylpyridineN(4)-cyclohexyl thiosemicarbazone (APCT) ligand and their respective retention uptake was determined. The best protection against decay fungi was provided by dibutyltin(IV) complex followed by diphenyltin(IV), dimethyltin(IV), monophenyltin(IV) and monomethyltin(IV) complexes with mean weight loss ranging from 4 to 5, 5 to 7, 8 to 9, 10 to 11 and 14 to 19 percent, respectively while the weight loss of the untreated wood cubes varied from 51 to 65 %. Wood densities decreased with increased weight loss. Density reduction of monosubstituted organotin(IV) treated wood cubes was higher than disubstituted organotin(IV) treated wood cubes. Soil block test showed that selected organotin(IV) complexes are effective and among all of them Md. M. Rahman (&) I. Jusoh Md. A. Affan A. Husaini Faculty of Resource Science and Technology, University Malaysia Sarawak, 94300 Kota Samarahan, Sarawak, Malaysia e-mail: [email protected] S. Hamdan Faculty of Engineering, University Malaysia Sarawak, Kota Samarahan, Sarawak, Malaysia
dibutyltin(APCT) complex gave the best protection against the tested T. versicolor and G. trabeum decay fungi. Die Wirksamkeit neuartiger Organozinn(IV)-Verbindungen gegenu¨ber holzzersto¨renden Pilzen bei nicht dauerhaftem Tropenholz Zusammenfassung Organozinn(IV)-Verbindungen finden aufgrund ihrer interessanten Strukturmerkmale und biologischen Aktivita¨t zunehmendes Interesse. Ziel dieser Studie war es, die Wirksamkeit neuartiger Organozinn(IV)Verbindungen gegenu¨ber den holzzersto¨renden Pilzarten Trametes versicolor und Gloeophyllum trabeum zu bestimmen. Freilandversuche im Erdkontakt wurden mit T. versicolor und G. trabeum u¨ber eine Dauer von 16 Wochen durchgefu¨hrt. Zehn 19 9 19 9 19 mm3 große Pru¨fko¨rper aus Alstonia scholaris, Macaranga triloba und Hevea brasiliensis wurden mit drei unterschiedlichen Konzentrationen (0,1; 0,5 und 1 %) von Monomethylzinn(IV) (MMT) und Monophenylzinn(IV) (MPT) der Mono-Organozinn(IV)-Verbindungen sow
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