Merbau (Intsia spp.) heartwood is a highly valued commercial wood but has problems with extractive bleeding when used as a construction material outdoors. The metal complexation method is one solution to resolve this problem. However, properties of merbau heartwood extracts would be modified and the anti-weathering ability changed. This study investigates the wood photo-protection ability of the merbau heartwood extract and its metal complexes. The results reveal that merbau heartwood extract has good free radical scavenging ability and UV absorptivity, which could inhibit wood photodegradation. After metal complexation, the extract-metal complexes also have wood photo-protection ability that inhibits wood photodegradation. Furthermore, since catecholic phenols were chelated by iron(II)/copper(II), the oxidative derivatives were consequently inhibited. Accordingly, these findings show that both merbau heartwood extract and its metal complexes have the ability to remove photo-induced hazards and enhance wood photostability for short periods of UV irradiation. Additionally, these results can be a reference for the environmentally benign utilization of merbau heartwood.

Merbau（印度spp。）心材是一种极有价值的商品木材，但当用作户外建筑材料时，存在抽出渗出的问题。金属络合方法是解决该问题的一种解决方案。但是，Merbau心材提取物的性能会发生变化，抗风化能力也会发生变化。这项研究调查了merbau心材提取物及其金属配合物对木材的光保护能力。结果表明，心宝心材提取物具有良好的自由基清除能力和紫外线吸收能力，可抑制木材的光降解。金属络合后，提取物金属络合物还具有抑制木材光降解的木材光保护能力。此外，由于儿茶酚酚被铁（II）/铜（II）螯合，因此氧化衍生物被抑制。因此，这些发现表明，心宝心材提取物及其金属配合物都具有去除光致危害并在短时间紫外线照射下增强木材光稳定性的能力。此外，这些结果可为Merbau心材的环境友好利用提供参考。